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Silicone products why will appear dark lines

Release time:

2021-01-18 15:05

Source:

Dongguan Mingzhen

The newly trained raw materials should pay attention to the temperature adjustment during molding. If the temperature is insufficient, stripes and even unripe phenomena will appear after the silicone products are molded. Therefore, the temperature should be raised every time they are molded. The silicone raw materials will also have problems after the silicone products factory is over-vulcanized. The raw materials themselves are transparent and vulcanized at high temperature after adding color masterbatch, and there is no problem at normal high temperature.

However, if the vulcanization time is too long, with the increase of temperature, the color masterbatch will have a slight scattering phenomenon of silicone key manufacturers in the raw materials, so there will also be color deviation phenomenon inside the product and dark marks. Therefore, it is not advisable to have too high temperature in the production process, and the temperature is too low to keep up with it. In this way, the dark mark phenomenon of the seal of the product can be solved and the customer is more satisfied.

Silicone strip in addition to good sealing, there are many characteristics of quite good.

1. Silicone sealing strip has good sealing performance, high temperature resistance, weather resistance, aging resistance, shockproof and waterproof, and can fit various rubber products with smooth surface materials.

2. Self-adhesive tape, better sealing performance, long-term use of high temperature resistant glue does not fall off, environmental protection and safety, good insulation, high temperature resistance, small compression deformation, strong resilience, and non-toxic.

3, heat resistance: rubber button silicone rubber has much better heat resistance than ordinary rubber, can be used almost forever at 150 degrees without performance change, can be used continuously at 200 degrees for 10,000 hours, at 350 degrees can also be used for a period of time.

We often encounter many problems in the production process of silicone products. What gives us a headache is the quality of the products. The quality problems can be divided into many types, including artificial problems, natural phenomena, mold problems, raw material problems of silicone products, etc. There are too many and too many problems. Then we find that the products have stripes and dark lines. Then the following small series will tell you about the cause analysis of dark lines in silicone products.

We carry out glue mixing process. Due to mechanized silicone key adhesive, uneven mixing will occur more or less. After adding vulcanizing agent and color masterbatch, the mixing time is too short, resulting in uneven original internal color and half dark and half light color. Therefore, it is important for glue mixing personnel to remind that the first process is required by sealing ring, and too long time after glue mixing will also lead to product quality problems in silicone products, generally, the material that is placed too long has a great influence on the hardness of the product. It should be used in time, and it should not be placed too long for one to two days.

Liquid silica gel.

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