JP4975578B2 - Packing for lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture packing, and more particularly to a lighting fixture packing that is bonded to a ceiling-side surface of a ceiling-mounted lighting fixture and compressed between the lighting fixture and the ceiling.

  The ceiling-mounted luminaire is attached to the ceiling by inserting a connection portion of the luminaire into the ceiling hook ceiling, and rotating the luminaire in this state to engage the hook ceiling and the luminaire connection portion.

  There is a type in which the ceiling-mounted lighting fixture is mounted in contact with the ceiling. In the ceiling-mounted lighting fixture of the type that is attached in contact with the ceiling, when the lighting fixture is attached to the ceiling, the wiring and the like located on the ceiling-side surface of the lighting fixture are in contact with the ceiling by the rotation of the lighting fixture. Conventionally, the packing 51 is adhered to the ceiling-side surface 62 of the luminaire 60 as shown in FIG. 3 in order to prevent breakage or to prevent the luminaire from rattling after installation. It has been broken. Reference numeral 61 denotes a lighting fixture body, and 63 denotes a lighting fixture cover.

  The packing 51 is often made of polyurethane foam for the reason that there is little permanent distortion (sagging) when used in a compressed state. However, when the packing 51 made of polyurethane foam is bonded to a ceiling-mounted lighting fixture and used for a long period of time, there is a problem that the ceiling surface in contact with the packing 51 is discolored.

  The discoloration of the ceiling surface occurs when the polyurethane foam is heated by the heat of the luminaire, and the contaminated gas is volatilized from the polyurethane foam, and the volatilized contaminated gas touches the vinyl chloride resin cloth or the like constituting the ceiling surface.

  Conventionally, in order to prevent discoloration of the ceiling surface, a flexible member made of an acrylic material is bonded to the surface of the polyurethane foam on the ceiling side so that the pollutant gas volatilized from the polyurethane foam does not contact the ceiling surface (patent) Document 1), an amine catalyst having a functional group that reacts with NCO in the molecule is used as a raw material for producing polyurethane foam to prevent volatilization of pollutant gases (Patent Document 2).

  By the way, the packing to be bonded to the ceiling-mounted lighting fixture is used by pressing the connection portion (attachment fitting) of the ceiling-mounted lighting fixture into the electric supply jig (hanging ceiling) that is previously attached to the ceiling. When fixing, the lighting fixture is fixed by the rebound resilience of the packing, and when rotating the cover of the lighting fixture for replacing the lamp, the rebound resilience of the packing located between the lighting fixture and the ceiling surface is used. Retainability of the luminaire is required.

  However, in a packing in which a flexible member made of an acrylic material is bonded to the surface of the polyurethane foam on the ceiling side, the soft member made of an acrylic material causes slipping too much, and the retainability when fixed to the ceiling is poor. It becomes like this. In addition, the acrylic itself is highly compatible with the plasticizer of the vinyl chloride resin, so the acrylic itself is contaminated and softened by the plasticizer contained in the vinyl chloride resin. Risk of damage. Further, since the number of steps increases due to the bonding, there is a problem that the manufacturing cost of the packing rises. On the other hand, in the packing using an amine-based catalyst having a functional group that reacts with NCO in the molecule as a raw material for producing polyurethane foam, the effect of the reactive catalyst is not sufficient, and the surface of the vinyl chloride resin cloth is discolored. May occur.

JP 2005-267882 A JP 2002-293862 A

  The present invention has been made in view of the above points, and prevents the discoloration of the ceiling surface, facilitates the rotation of the lighting fixture when the lighting fixture is attached to the ceiling, and has good retention on the ceiling. The purpose is to provide packing for appliances.

The invention of claim 1 is a packing for a lighting fixture which is bonded to a ceiling-side surface of a ceiling-mounted lighting fixture and is compressed between the ceiling-mounted lighting fixture and the ceiling, and a packing body made of polyurethane foam A surface film having a thickness of 30 to 100 μm formed by curing a moisture-curable urethane-based hot melt is provided on the surface of the ceiling.

The invention of claim 2 is characterized in that, in claim 1 , the polyurethane foam is made of a flexible polyurethane foam having a density of 15 to 40 kg / m ³ .

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the pollutant gas which volatilizes from the polyurethane foam of a packing main body contacts a ceiling surface, and discolors a ceiling surface by the surface film | membrane which the moisture hardening type urethane type hot melt hardened | cured. In addition, unlike ordinary thermoplastic hot melts, moisture-curing urethane hot melts have a low affinity for plasticizers contained in vinyl chloride resins that make up the cloth on the ceiling surface, so the ceiling surface is chlorinated. When the cloth is made of vinyl resin or other cloth, it can prevent the plasticizer contained in the vinyl chloride resin on the ceiling surface from seeping out and so on, so that it can be transferred from the ceiling surface to the surface film. There is no risk of discoloring the ceiling surface due to the transferred plasticizer. Furthermore, the packing according to the present invention has a resilience when attaching the lighting fixture to the ceiling, and the retention of the lighting fixture on the ceiling when the cover of the lighting fixture is rotated. Can be exhibited by a hardened surface film.

  Further, unlike ordinary thermoplastic hot melts, the moisture curable urethane hot melt is reactively cured by moisture in the air, the reaction is irreversible, and the heat resistance after reaction curing is good. Therefore, the moisture curable urethane hot melt constituting the surface film is not deformed or altered by the heat of the lighting fixture, and the surface film is not peeled off from the packing body. On the other hand, when the surface film of the packing is composed of a thermoplastic hot melt such as an olefin such as polyamide or EVA, the surface film may be deformed or deteriorated by the heat of the lighting fixture and peeled off from the packing body. . Furthermore, the plasticizer contained in the cloth such as vinyl chloride resin may be softened and liquefied by shifting to the thermoplastic hot melt film, and conversely, the cloth such as vinyl chloride resin may be soiled.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a cross-sectional view of a lighting fixture packing according to an embodiment of the present invention. The illustrated lighting fixture packing 10 is bonded to a ceiling-side surface 62 of a ceiling-mounted lighting fixture 60 as shown in FIG. 3 and compressed between the ceiling-mounted lighting fixture 60 and the ceiling. It consists of a packing body 11 and a surface coating 21 provided on the ceiling-side surface of the packing body 11.

The packing body 11 is made of polyurethane foam. The polyurethane foam constituting the packing body 11 preferably has a density of 15 to 40 kg / m ³ so that the lighting apparatus can be fixed to the ceiling without rattling when the lighting apparatus is attached to the ceiling. The polyurethane foam constituting the packing body 11 may be either an ether type or an ester type, but is preferably an ether type that hardly causes wet heat deterioration. The cross-sectional shape of the packing body 11 is not particularly limited, but is usually a square or a rectangle. The dimension of the packing body 11 is determined to be an optimum value according to the size of the lighting fixture to which the packing 10 is attached, the distance between the lighting fixture and the ceiling, and the like. In addition, about the height (thickness) of the said packing main body 11, when a lighting fixture is attached to a ceiling, the packing main body 11 is set to the value compressed.

  The surface film 21 is composed of a film obtained by curing a moisture curable urethane hot melt. The moisture-curable urethane hot melt is one that is reactively cured by moisture in the air, and preferably has a urethane prepolymer having an isocyanate group at the terminal as a main component. The thickness of the surface film 21 formed by curing the moisture curable urethane hot melt is preferably 20 to 100 μm. When the surface film 21 is thinner than 20 μm, the shielding property of the polluting gas volatilized from the polyurethane foam is deteriorated. Further, when the lighting fixture is attached to the ceiling, the surface coating 21 is caused by compression / repulsion of the packing during the mounting operation performed by pressing the surface coating 21 of the packing 10 against the ceiling surface and rotation of the lighting cover when the lighting lamp is replaced. May be torn. On the other hand, if the surface film 21 is thicker than 100 μm, the retainability for fixing the lighting fixture to the ceiling may be impaired. Furthermore, the film becomes too hard and the flexibility is impaired, and the raw material cost increases.

  Note that the surface of the lighting fixture packing 10 opposite to the surface coating 21 is bonded to a ceiling side surface of a ceiling-mounted lighting fixture with an adhesive or the like.

  Next, an example of the manufacturing method of the said lighting fixture packing 10 is shown. FIG. 2 is a diagram schematically showing a manufacturing apparatus 30 for manufacturing the packing 10.

  In the packing manufacturing method using the manufacturing apparatus 30, the release paper 41 is supplied to the nip rolls 31, 31 and the surface of the release paper 41 is placed on the surface of the release paper 41 at a position before the nip rolls 31, 31 by a known die coater method. Urethane hot melt 21A is applied with a predetermined thickness. Examples of the release paper 41 include materials such as PP-coated paper and PE-coated paper. In the die coater method, the moisture curable urethane hot melt 21A is supplied from the applicator 35 to the die coater head 32, and the moisture curable urethane hot melt 21A is pressurized by the die coater head 32 and applied to the release paper 41. The die coater method is a preferable method because unlike the roll coater method and the multi-roll method, the moisture curing urethane hot melt 21 </ b> A applied to the release paper 41 is less likely to be waved. If the applied moisture-curing urethane hot melt 21A is wavy, when the moisture-curing urethane hot melt 21A becomes the surface film 21 of the packing 10, the surface film 21 has a coating thickness variation. May occur, and there may be variations in the anti-transfer effect and the holding force for fixing the lighting fixture to the ceiling. The coating thickness of the moisture curable urethane hot melt 21 </ b> A is made equal to the thickness of the surface film 21. The application thickness is adjusted by controlling the discharge amount of the moisture curable urethane hot melt 21A from the die coater head 32 by the rotational speed of the gear pump and the capacity of the gear pump. Reference numeral 37 is a backup roll, and 39 is a conveyor belt.

  A packing body 11 made of polyurethane foam is supplied to the nip rolls 31 and 31. In the nip rolls 31, the packing body 11 is pressed against the surface of the moisture curable urethane hot melt 21 A of the release paper 41, and the moisture curable urethane hot melt 21 A and the packing body 11 are laminated on the release paper 41. To do. The gap between the nip rolls 31 and 31 is such that the packing body 11 can be pressed against the moisture-curing urethane hot melt 21A with the nip rolls 31 and 31, so that the thickness of the target packing and the thickness of the release paper 41 can be reduced. The total is preferably smaller than the total, for example, about 1 to 5 mm. In a state where the moisture-curable urethane hot melt 21A and the packing body 11 are laminated on the release paper 41, the release paper 41 is transferred forward for a predetermined time, and the moisture-curable urethane hot melt 21A is in the air in the meantime. The surface film 21 cured by moisture and cured by the moisture curable urethane hot melt 21A is formed on the release paper side surface of the packing body 11. Thereby, the laminate 10 </ b> A in which the lighting fixture packing 10 is laminated on the release paper 41 is obtained. The lighting device packing 10 is obtained by peeling the release paper 41 from the laminate 10A thus obtained. The lighting device packing 10 is cut into a predetermined size in a state where the release paper 41 is attached or after the release paper 41 is peeled off.

Using the manufacturing apparatus 30 shown in FIG. 2, a release paper (material PP coated paper, thickness 100 μm) 41 is conveyed forward by the conveyor belt 39 at a speed of 10 m / min, and before the nip rolls 31, 31, diphenylmethane A moisture curable urethane hot melt 21A made of diisocyanate MDI type was discharged from the die coater head 32 onto the surface of the release paper 41 at 120 ° C. to a thickness of 40 μm. Further, a packing body 11 made of a flexible polyurethane foam having a thickness of 20 mm (density: 39 kg / m ³ , ether type, product name: ESH-2, manufactured by Inoac Corporation) is supplied to the nip rolls 31, 31, and the nip roll 31 and 31, the packing body 11 was laminated on the moisture-curable urethane hot melt 21A. The distance between the nip rolls 31 is 31 mm. The release paper 41 is conveyed further forward from the position of the nip rolls 31 and 31 in a state where the moisture-curable urethane hot melt 21A and the packing body 11 are laminated on the release paper 41, and the moisture in the air is conveyed during the conveyance. The moisture curable urethane hot melt 21A is reaction-cured to form the surface film 21 to form a laminate 10A in which the lighting fixture packing 10 is laminated on the release paper 41, and 15 m ahead of the nip rolls 31 and 31. The laminated body 10A was wound up at the position.

  The laminated body 10A thus obtained was allowed to stand at 35 ° C. and 85% RH for 72 hours to complete the reaction curing of the moisture-curable urethane hot melt, and then cut into a width of 25 mm and a length of 120 mm. Then, the release paper 41 was peeled off to obtain an example of the packing 10 for lighting equipment.

  In the lighting fixture packing 10 of the embodiment obtained in this way, an adhesive (material acrylic solvent) is applied to the surface opposite to the surface coating 21, and the ceiling-mounted lighting fixture as shown in FIG. 4 were bonded to the ceiling-side surface 62 with the pressure-sensitive adhesive. First, a connecting portion of a ceiling-mounted lighting fixture is inserted and attached to a hook ceiling provided on a ceiling surface made of a polyvinyl chloride resin cloth. Next, the ceiling-mounted lighting fixture is pressed against the ceiling surface to bring the surface coating 21 of the lighting fixture packing 10 into contact with the ceiling surface, and the packing body 11 is compressed, and the lighting fixture is pressed in this state. And hooked through the connection and fixed to the ceiling. At that time, the attaching operation of the lighting fixture could be performed smoothly. In addition, the lighting fixture attached to the ceiling has a space between the ceiling side surface to which the lighting fixture packing 10 is attached and the ceiling surface is 10 mm, and the lighting fixture is in a state where the lighting fixture packing 10 is compressed. It was fixed to the ceiling surface and was in a good fixed state without rattling.

  Moreover, in order to investigate the discoloration with respect to the ceiling surface in the packing 10 for lighting fixtures of a present Example, the following tests were done. Test method: Moisture and heat aging resistance transfer evaluation: 50 × 50 mm test piece (thickness: 20 mm) with the coated surface in close contact with a cloth cloth made of vinyl chloride resin, compress the test piece by 50%, Leave at 90% RH for 1 month to evaluate discoloration. For comparison, instead of the packing for lighting equipment of Comparative Example 1 consisting only of polyurethane foam without the surface coating, and the surface coating of the moisture curable urethane hot melt, a thermoplastic hot melt (polyolefin EVA type, product name) : Packing for lighting equipment of Comparative Example 2 provided with a surface coating (thickness 40 μm) made of Hybon 9880L, manufactured by Hitachi Chemical Polymer Co., Ltd. The discoloration on the ceiling surface was examined. As a result, no discoloration was observed on the ceiling surface in the examples, whereas discoloration was observed on the ceiling surface in Comparative Examples 1 and 2. From this, it turns out that the packing for lighting fixtures of this invention has the effect which prevents discoloration of a ceiling surface.

It is a perspective view of packing for lighting fixtures concerning one example of the present invention. It is a figure which shows the example of the apparatus which manufactures the packing for lighting fixtures of this invention. It is a perspective view of the lighting fixture of the state which attached the packing for lighting fixtures.

Explanation of symbols

10 Packing for lighting equipment 11 Packing body 21 Surface coating

Claims (2)

In the packing for lighting fixtures, which is bonded between the ceiling-side lighting fixture and the ceiling and bonded to the ceiling-side surface of the ceiling-mounting lighting fixture,
A packing for lighting equipment, wherein a surface film having a thickness of 30 to 100 μm formed by curing a moisture-curable urethane-based hot melt is provided on a ceiling-side surface of a packing body made of polyurethane foam. The packing for lighting equipment according to claim 1, wherein the polyurethane foam is made of a flexible polyurethane foam having a density of 15 to 40 kg / m ³ .

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