Glow-in-the-dark
Glow-in-the-dark refers to the property of absorbing light and storing energy, then emitting light in the dark, or to the material or treatment that provides this effect. In zippers, it mainly refers to a specification used on the teeth and other parts.
Contents6 sections
Definition and Overview
A glow-in-the-dark zipper is a zipper that emits light in dark places after receiving sunlight or light from a lamp in a bright place. In zippers, a typical type uses glow-in-the-dark material for the teeth, which are the interlocking parts. There are also specifications that give glow-in-the-dark functionality to parts other than the teeth, such as the tape and pull tab.
The appearance and duration of the light emission vary depending on the type of glow-in-the-dark material, the intensity and duration of light exposure, and the surrounding brightness. For this reason, it should be understood as a function that helps locate positions in the dark, not as something that emits the same brightness all the time.
Structure and Parts
A zipper is made up of interlocking teeth on the left and right, a slider that moves the teeth to open and close the zipper, top stops and a bottom stop at the ends, and zipper tape that supports the teeth. In glow-in-the-dark specifications, there are structures that use resin blended with glow-in-the-dark material for the teeth.
Glow-in-the-dark does not describe the zipper's opening and closing type or the structure itself. It should be checked as an added light-emitting function separate from specifications such as open-end zippers, closed-end zippers, two way separators, and double sliders.
- Teeth: The parts that interlock on the left and right to form the opening and closing section.
- Slider: The part that interlocks or separates the teeth.
- Top stop and bottom stop: End parts that define the slider travel range.
- Zipper tape: The tape used to attach the teeth and sew them to the textile.
Types and Specification Checks
When selecting a glow-in-the-dark specification, specify the zipper type, tooth size, length, opening style, tape color, and slider specification in the same way as for standard products. Tooth size is the term used to indicate the approximate width when the teeth are closed, and it is selected according to the strength required for the application, the thickness of the textile, and the appearance.
Length is generally indicated by the distance from the top stop to the bottom stop, or by a specified standard that includes the opening end. Because the measurement standard may differ for open-end and two way separator specifications, confirm the indicated product dimensions and the required finished length when ordering.
Main Applications and How to Choose
Glow-in-the-dark zippers are used for clothing, bags, accessories, and other items where it is desirable to make openings and storage positions easier to find in dark environments. In outdoor, sports, uniform, and kids' products, they may be selected both for design and for visibility.
Depending on the application, check the required tooth size, frequency of opening and closing, load, and the thickness of the textile where the tape will be sewn. Since the impression of the glow color and brightness changes with surrounding conditions, it is important to shine light on an actual sample during the planning stage and confirm how it looks in the dark.
Sewing and Handling Notes
In sewing, if the needle comes too close from the tape edge to the teeth, it may interfere with the teeth or slider and cause opening and closing problems. Follow the specified sewing position for the tape, and after sewing, check the full length by opening and closing it several times, including for textile tension and waviness.
Resistance to washing, friction, heat, and chemicals varies depending on the part using glow-in-the-dark material and the zipper construction. If product washing, bleaching, dry cleaning, or ironing is planned, perform washing tests and check the appearance and light-emitting condition in advance.
Frequently Asked Questions
What is the difference between a glow-in-the-dark zipper and a reflective zipper?
A glow-in-the-dark zipper is a specification that stores the energy of light received beforehand and appears to glow on its own in the dark. A reflective zipper is a specification that reflects light from an external source such as a lamp to make it easier to see. There are materials that combine both functions, but the appearance and required conditions are different.
Does a glow-in-the-dark zipper light up immediately in the dark?
Glow-in-the-dark material emits light by receiving light in a bright place. If it has not received enough light, or if the surroundings are bright, it may be difficult to confirm the glow. Assume the lighting conditions of the actual usage environment, and check how it looks after exposure to light during the prototype stage.
Where do you measure the length of a glow-in-the-dark zipper?
For a typical closed-end zipper, check the length from the top stop to the bottom stop. However, open-end zippers and two way separator zippers may have different measurement standards that include the opening end. When ordering, check not only the nominal length but also the measurement standard shown in the specification drawing and product label.
