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A kind of silicone button and preparation method thereof

A button and silicone technology, applied in the field of silicone buttons and their preparation, can solve problems such as paint stripping, low surface energy of silicone buttons, and difficulty in silk screen printing, so as to improve the lubrication effect, solve difficult silk screen or paint removal, and reduce the amount of chitosan Effect

Active Publication Date: 2022-04-22
普禄达(厦门)电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it was found that the release agent zinc stearate used is a low-polarity substance, which will cause the silicone keypad to exhibit low surface energy characteristics, and the produced silicone keypad products will inevitably have difficulty in silk screen printing or paint removal. defective product

Method used

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  • A kind of silicone button and preparation method thereof

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preparation example Construction

[0031] The preparation steps of above-mentioned embodiment 1-3 and comparative example 1-4 are as follows:

[0032] Step 1. Weigh the silicone rubber raw rubber according to the ratio in Table 1, put the silicone rubber raw rubber in an internal mixer and knead for 8 minutes, control the mixing temperature at 45-47°C, and control the workshop temperature at 22-24°C;

[0033] Step 2, weigh vulcanizing agent, release agent, hydrotalcite, chitosan, color paste, catalyst according to the ratio in Table 1, then add vulcanizing agent, release agent, hydrotalcite, chitosan to the silicone rubber mixing , color paste, and catalyst for secondary mixing, mixing for 15 minutes, the temperature of the rubber mixing is controlled at 45-47°C, and the temperature of the workshop is controlled at 22-24°C to prepare the mixed rubber;

[0034] Step 3. Put the mixed rubber obtained in Step 2 into the key mold for vulcanization. The temperature of the mold is controlled at 180-185° C., the moldin...

Embodiment 4

[0040] Step 1. Weigh 150 parts of silicone rubber raw rubber, put the silicone rubber raw rubber in an internal mixer and mix for 8 minutes, control the mixing temperature at 45-47°C, and control the workshop temperature at 22-24°C;

[0041] Step 2: Add 0.3 part of vulcanizing agent, 0.2 part of release agent, 0.15 part of hydrotalcite, 0.05 part of chitosan, 10 parts of color paste, 0.1 part of catalyst to the silicone rubber mixing, and carry out secondary mixing for 15 minutes. The rubber mixing temperature is controlled at 45-47°C, and the workshop temperature is controlled at 22-24°C to prepare the mixed rubber;

[0042] Step 3. Mix the rubber compound obtained in step 2 and 0.15 parts of carbon fiber treated with ortho-dibutyl ester surface activation and put it into a key mold for vulcanization. The mold temperature is controlled at 180-185°C, the molding time is 56-58S, and vulcanization is formed. Get the silicone button. Among them, the activation treatment process ...

Embodiment 5

[0044] Step 1. Weigh 150 parts of silicone rubber raw rubber, put the silicone rubber raw rubber in an internal mixer and mix for 8 minutes, control the mixing temperature at 45-47°C, and control the workshop temperature at 22-24°C;

[0045] Step 2: Add 0.3 part of vulcanizing agent, 0.2 part of release agent, 0.15 part of hydrotalcite, 0.05 part of chitosan, 10 parts of color paste, 0.1 part of catalyst to the silicone rubber mixing, and carry out secondary mixing for 15 minutes. The rubber mixing temperature is controlled at 45-47°C, and the workshop temperature is controlled at 22-24°C to prepare the mixed rubber;

[0046] Step 3: Mix the compounded rubber obtained in Step 2 and 0.15 parts of carbon fiber into the key mold for vulcanization. The mold temperature is controlled at 180-185°C, the molding time is 87-90 seconds, and vulcanization is formed to obtain the silicone key.

[0047] The silicone rubber keys of Example 3, Example 4 and Example 5 were tested for hardness...

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Abstract

The present invention provides a silica gel button and a preparation method thereof, wherein the silica gel button, in parts by weight, comprises: 100-150 parts of silicone rubber; 0.3-2 parts of vulcanizing agent; 0.1-0.25 parts of release agent; 0.1-0.15 part of hydrotalcite; 0.05-0.07 part of chitosan; the release agent is stearate; and the hydrotalcite is subjected to stearate wet surface treatment. The silica gel key of the present invention increases the surface energy of the silica gel key through the synergistic effect between the release agent, hydrotalcite and chitosan, so that the surface contact angle of the silica gel key decreases, thereby improving the difficulty of silk screen printing of the silica gel key. And the problem of easy peeling paint.

Description

technical field [0001] The invention relates to the technical field of silica gel button modification, in particular to a silica gel button and a preparation method thereof. Background technique [0002] Silicone button is a kind of silicone rubber product, which is often used in electronic calculators, remote controls, telephones, wireless telephones, electronic toys, computer keyboards, learning machine buttons, cipher buttons, and digital product buttons. During the development of silicone buttons, with the research on the modification of silicone materials, today's silicone buttons generally have excellent heat resistance, cold resistance, environmental resistance, electrical insulation, fatigue resistance and other characteristics. [0003] In the preparation process of silicone button products, it usually needs to go through multiple processes such as material preparation, vulcanization, demoulding, silk screen printing / oil injection, punching and so on. Among them, d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L5/08C08K13/06C08K9/04C08K7/00C08K5/098C08K3/36C08K7/06B29C35/02
Inventor 邱启发
Owner 普禄达(厦门)电子科技有限公司
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