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Core performance advantages: adapt to the rigourous use scenarios of lamps
1. Excellent temperature resistance, suitable for the thermal environment of lamps
Lamps will continue to heat up when they are lit (especially LED drive, halogen lamps, etc.). Silicone foam strips can withstand the extreme temperature range of -60℃~200℃, and some high-standard products can reach up to 250℃. Long-term use will not age, soften or be brittle, and avoid sealing failure or structure caused by temperature changes. Deformation, solve the pain points of ordinary rubber strips (such as ternary ethylene propylene) that are easy to crack at high temperature and easy to harden at low temperature.
2. Efficient sealing + dustproof and waterproof, protecting the internal safety of the lamp
• Sealing performance: The silicone foam strip has a delicate and uniform closed-pore bubble structure, and the compression rebound rate can reach more than 70%. It can closely fill the gap between the lamp shell, lamp body and glass/mask, effectively block the intrusion of dust, mosquitoes and water vapour. It is suitable for IP65/IP67 and other waterproof level requirements, especially suitable for Wet/dusty scenes such as outdoor street lights, courtyard lights, bathroom mirror lights, etc.
• Anti-permeability: The closed-pore structure makes it non-absorbent and oil-seepage. It will not increase its own weight or grow mould due to moisture absorption, ensuring the stability of the internal circuit and light source of the lamp.
3. Excellent insulation, enhanced electrical safety
Silicone itself is a high-insulating material, with a volume resistivity of ≥10¹4Ω·cm, and a breakdown voltage of ≥20kV/mm. It can be used as an insulating buffer between the internal circuit of the lamp and the metal shell to avoid safety accidents caused by shell leakage and circuit short circuit. It is suitable for ceiling lamps, downlights and other indoor lamps that need to come into contact with mains electricity.
4. Stable chemical inertness, extend the service life of lamps
• Strong weather resistance: ultraviolet resistance (UV), ozone resistance, acid and alkali corrosion resistance, long-term exposure to outdoor sunlight, rain and haze environments, the performance decay rate is less than 5%, which is far better than ordinary foam strips, reducing the maintenance frequency of outdoor lamps.
• No volatile pollution: It meets RoHS, REACH and other environmental protection standards, does not release toxic and harmful gases (such as formaldehyde and VOC) at high temperatures, and is suitable for indoor lamp scenarios with high environmental protection requirements such as children's rooms and bedrooms.
Product characteristics: both practicality and adaptability
1. Flexible shape, suitable for a variety of lamp structures
• Rich specifications: It can be customised into a variety of cross-sections such as rectangular, round, semicircular, D-type, U-shaped, etc., with a thickness of 0.5mm~50mm optional, and the length can be cut on demand (up to 50 metres/roll), suitable for different structural needs such as ceiling lamp frames, floodlight body, outdoor floodlight seals, etc.
• Easy to process: It supports secondary processing such as die-cutting, punching, bonding, etc., and can be made into ring and shaped sealing gaskets. It can be adapted to the complex assembly gaps of lamps. No complex tools are required for installation, and manual pressing can be fitted.
2. Soft cushioning, protecting the lamp parts and the mounting surface
The hardness of the silicone foam strip is adjustable (30 Shore A~70 Shore A), with a soft and elastic texture. It can cushion the collision and compression of metal/plastic parts during the assembly of the lamp, and avoid scratches and cracking of the lamp body and mask due to assembly stress; at the same time, with the wall, ceiling, etc. When the mounting surface comes into contact, it can reduce friction damage and improve the aesthetics of installation.
3. Lightweight design, does not increase the load of the lamp
Compared with solid silicone strips or rubber strips, the density of silicone foam strips is only 0.3~0.8g/cm³, and the weight is lighter. It is especially suitable for suspended lamps such as ceiling lamps and chandeliers. It will not increase the load-bearing pressure of the lamp installation due to the weight of the seal and reduce the risk of falling off.
4. Colour customisation, adapt to the appearance style of lamps
In addition to conventional black and gray, a variety of colours such as white, transparent and colour can be customised to match the colour of the lamp shell (such as white ceiling lamp with white sealing strip) to achieve "invisible sealing", improve the overall aesthetics of the lamp and avoid the visual awkwardness of the traditional black seal.
Scene adaptation highlights: accurate solution to the pain points of lamps
• Outdoor lamps: Through weather resistance, waterproof, high and low temperature resistance, it solves the internal moisture and component ageing problems of outdoor street lamps and lawn lamps caused by rainwater and ultraviolet rays.
• Indoor precision lamps: such as downlights and track lamps, take advantage of the characteristics of lightweight and easy processing to adapt to the narrow installation space, while ensuring circuit safety through insulation.
• Heat dissipation lamps: such as LED industrial and mining lamps, automobile headlights, the temperature resistance of silicone foam strips can be adapted to the sealing needs of the heat dissipation holes of the lamp, which neither hinders heat dissipation nor prevents dust from entering.
• Decorative lamps: such as crystal chandeliers and Nordic style table lamps, through colour customisation and soft texture, take into account the sealing function and decoration, and do not destroy the overall design sense of the lamp.
FAQ:
Frequently Asked Questions and Answers about Silicone Foam Strips for Lamps
I. Sealing and protection issues
1. Question: After the lamp is installed, there is still water and dust. Is it a problem with the silicone foam strip?
Answer: There may be three reasons: first, the specifications of the foam strip do not match the gap of the lamp (too thin or too thin); second, it does not fit completely during installation, and there are folds, breaks or splicing gaps; third, the foam strip is ageing and loses elasticity. It is recommended to replace the new strip that adapts to the specifications. When installing, make sure that it is flat and there is no gap, and the joint can overlap 1-2mm.
2. Question: After using the silicone foam strips of outdoor lamps for a period of time, the waterproof effect is significantly reduced. Why?
Answer: Ultraviolet and high and low temperature cycles in outdoor environments will accelerate the ageing of silicone, resulting in reduced elasticity, surface cracking, and decline in sealing performance. It is necessary to choose a special silicone foam strip for "weather-resistant" lamps, and check and replace the ageing strip regularly (1-2 years is recommended).
II. Installation and adaptation problems
1. Question: Silicone foam strips are easy to shift during installation and are not easy to fix. How to deal with it?
Answer: You can choose a special silicone foam strip for lamps with backing glue, tear off the mould paper and paste it directly into the lamp sealing groove; if it is a backing-free type, a small amount of neutral silicone adhesive can be evenly applied in the groove (pay attention to avoid contamination of the optical parts of the lamp), and then embed the foam strip.
2. Question: The sealing groove of the lamp is irregular, and the ordinary straight foam strip cannot be fully fitted. How to solve it?
Answer: Choose a cuttable flexible silicone foam strip, cut it one by one according to the shape of the groove and stitch it together; for parts with a large curvature, the foam strip can be heated to 40-60��C (with a hot air with a hair dryer), soften it and fit, and the shape can be fixed after cooling.
III. Performance and ageing problems
1. Question: When the lamp heats up when working, will the silicone foam strip melt or deform?
Answer: The temperature-resistant range of silicone foam strips for regular lamps is usually -40℃~200℃, which can withstand the working temperature of ordinary lamps (such as LED lamps and downlights). If there is deformation, it may be that poor-quality low-temperature foam strips are used, and products that meet the "lamp-level" temperature-resistant standards need to be replaced.
2. Question: What is the reason why the silicone foam strip becomes hard, brittle and loses its elasticity after a period of use?
Answer: It is mainly caused by "ageing", and the molecular structure of silicone changes under the influence of high temperature, ultraviolet rays and chemical volatiles (such as plastic shell releases) in lamps. It is a normal loss and needs to be replaced in time. It is recommended to give priority to high-quality silicone foam strips with anti-ageing agent.
IV. Selection and quality issues
1. Question: How to choose the specifications of silicone foam strips suitable for lamps?
Answer: The core is to look at the "width × depth of the lamp sealing groove". The cross-sectional size of the foam strip is recommended to be 10%-20% larger than that of the groove body (for example, the groove width is 10mm × 5mm deep, and the strip of 11mm × 6mm is selected). Ensure that there is a certain amount of compression after embedding to realise sealing; at the same time, according to the use scenario (indoor /Outdoor) Choose the ordinary type or the weather-resistant type.
2. Question: How to judge whether the purchased silicone foam strip meets the standards for using lamps?
Answer: It can be easily identified through three points: first, look at the test report, regular products should have "RoHS" (environmental protection), "temperature resistance level", "weather resistance" and other test certificates; second, smell, high-quality silicone has no pungent odour, and inferior products may have rubber smell or sour taste; third, test the elasticity, and it can be quickly returned after squeezing by hand. Bullet, not easy to deform and tear.
