JPS599829A - Production process for fluorescent lamp - Google Patents

Abstract

PURPOSE:To firmly stick a metallic thin film tape entirely onto the internally curved surface of the bulb of a ring-like fluorescent lamp, without possibility of exfoliation by using as an adjacent conductor a tape which is provided with the metallic thin film on a resin-made base, by sticking said tape onto the external surface of said fluorescent lamp while heating said tape up to such temperature at which this resin-made base at least generates thermal deformation. CONSTITUTION:As adhesive layer 5 is set up entirely on the one side surface of a base 3 made of polyester, and an Al thin film layer 4 narrower than that of the base 3 is set up on the surface of the adhesive layer 5. Consequently, the Al thin film layer 4 is firmly stuck onto the surface of the fluorescent lamp 1 by means of the adhesive layer 5 whose width is wider than that of the Al thin film layer 4. When stuck, a tape 2 is heated up to such temperature at which the base is thermally deformed, with the result that the tape 2 is completely stuck onto said surface without generating gap and exfoliation between the tape 2 and the fluorescent lamp 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a fluorescent lamp having a proximate conductor on the outer surface of the tube, and particularly relates to a method for pasting when a metal thin film tape is used as the proximal conductor. .

When using a resistive ballast to start a fluorescent lamp, a proximal conductor is typically used to aid in starting.

Conventional starting aids include a structure in which a nearby conductor such as a coated conductor is bonded to the entire outer surface of the fluorescent lamp with silicone adhesive or the like to lower the lamp starting voltage. However, the apparent potential Q′ given to such a covered conductor
is smaller than that of metal thin film tape. Therefore, there is a drawback that starting problems tend to occur.

However, in a structure in which a metal thin film tape is attached to serve as a close conductor, for example, when it is attached to the outer periphery of the inner curved surface of the pulp of an annular fluorescent lamp, the stress at the time of attachment remains and the tape is attached during lighting. It has the disadvantage of peeling off, and currently there is no good adhesive method.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for manufacturing a fluorescent lamp, which eliminates the above-mentioned drawbacks, in which a metal thin film tape as a proximal conductor can be firmly attached to the entire circumference of the inner curved surface of the pulp of an annular fluorescent lamp, for example, without peeling. It's about doing.

In order to achieve the above object, the present invention uses a tape in which a metal thin film is provided on a resin base as a proximal conductor, and while heating the tape to a temperature at which the resin base at least causes thermal deformation, a fluorescent light is emitted. A piece of tape is pasted onto the outside surface of the lamp.

The present invention was made by focusing on the temperature characteristics of the resin used for the base of the metal thin film tape, and such resins easily deform when heated above a predetermined temperature. If the tape is already deformed into the same shape as the bulb curve when it is applied to the outer surface of the pulp of a fluorescent lamp, there will be no residual stress and no subsequent peeling will occur.

The present invention will be explained below based on examples.

Figures 1(a) and 1(b) are external views and A when a metal thin film tape 2 as a proximal conductor is pasted all around the inner curved surface of an annular fluorescent lamp 1 according to the manufacturing method of the present invention. -A
'This is a cross-sectional view.

As is clear from the cross-sectional view of FIG. 1(b), the tape used at this time was provided with an adhesive layer 5 on the entire surface of one side of a polyester base 3, and an A4 thin film layer 4 was placed on the surface of the adhesive layer 5. It consists of a piece that is made narrower.

Therefore, the At thin film layer 4 is firmly attached to the surface of the fluorescent lamp 1 by the adhesive layer 5 having a wider width.

This pasting is sometimes carried out while heating the tape 2 to a temperature that causes thermal deformation of the base 3, so that it can be reliably pasted without creating any gaps or peeling between the tape 2 and the fluorescent lamp 1. .

This pasting was carried out by applying heat to the tape 2 and applying it to the fluorescent lamp 1 at a speed of 10 crn/ha using a 500g pressure roller. After 60 minutes, a peeling test of the tape 2 was carried out.
JISZ 0237), as shown in Figure 2, the tensile strength suddenly increased when the heating temperature was around 80C, and the tensile strength was 1.6 to 1.7 when the heating temperature was 110C or higher.
The tensile strength was Kg. This is presumed to be because the resin base 3 is deformed at a temperature of 110C or more, so that the base 3 is deformed into a shape that matches the curved surface of the fluorescent Y plate 1 and is then bonded.

Conversely, at low heating temperatures, the tape 2 is not completely adhered to the surface of the fluorescent lamp 1, and because stress remains, it is thought that the tape 2 floats slightly and appears to be stuck. In addition, an acrylic adhesive is used as the adhesive for the adhesive layer 5, and it is assumed that this adhesive has stronger adhesive strength at a relatively high temperature. .

However, when this tape 2 is heated to a temperature exceeding 250C, a phenomenon in which the base 3 shrinks is observed;
This is not practical as it tends to stick to the pressure roller. Therefore, the heating temperature of the tape 2 should be at least the temperature at which the resin base 3 undergoes thermal deformation, and is preferably 11
It is 0C or higher. The upper limit value may be below the temperature at which the base 3 shrinks, preferably 250.
C or lower.

The specifications of the tape 2 used in the above example are as follows. The polyester base 3 has a width of lO■, a thickness of 21 μm, an adhesive layer 5 of 55 μm, and an At thin film layer 4.
has a width of 5 fins and a thickness of 15 μm, and the center of the width of the base 3 coincides with the center of the width of the thin film layer 4.

According to the present invention, it is possible to easily put into practical use a metal thin film tape which has an even better effect as a close conductor, so that the effect of improving reliability can be obtained.

Note that the tape serving as the proximal conductor may have a cross-sectional structure other than the above-mentioned one, as long as it has a thin metal film on a resin base. Further, the metal thin film may be made of other metals other than At, such as Cu. Furthermore, the fluorescent lamp is not limited to a ring-shaped fluorescent lamp, but may be a straight tube. Furthermore, it goes without saying that the tape can be pasted at any other location as long as it is on the outer surface of the tube.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are an external view of an annular fluorescent lamp manufactured by the manufacturing method of the present invention and its A-A' cross-sectional view, and Figure 2 shows the heating temperature when the metal thin film tape is soldered. It is a graph showing changes in adhesive strength when changing.

Claims (1)

[Claims] 1. A method for manufacturing a fluorescent lamp comprising the step of pasting a tape in which a metal thin film is provided on a resin base as a proximal conductor on the outer surface of the fluorescent lamp, wherein the resin base is A method for manufacturing a fluorescent lamp, comprising applying the tape to the outer surface of the fluorescent lamp while heating the tape to a temperature that causes at least thermal deformation. 2. The method for manufacturing a fluorescent lamp according to item 1, wherein the heating temperature is in a range of 110C to 250C. 3. The method for manufacturing a fluorescent lamp according to item 1 or 2, wherein the tape is made of a thin aluminum film provided on a polyester base. 4. Any one of items 1 to 3, wherein the fluorescent lamp is not an annular fluorescent lamp, and the tape is pasted on the inner peripheral surface of the annular fluorescent lamp. A method for manufacturing fluorescent lamps in one section.