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Silicone rubber strip for windscreen wiper and preparation method thereof

A silicone strip, wiper technology, applied in vehicle maintenance, transportation and packaging, vehicle cleaning and other directions, can solve the problems of short service life, poor toughness, poor shape and corrosion resistance, and reduced product strength, and achieve long service life, Strong corrosion resistance and good softness

Inactive Publication Date: 2016-04-13
ZHEJIANG YUANCHUANG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing wiper strips are made of rubber, which has poor toughness, shapeability and corrosion resistance, especially the relatively poor softness, which makes the fit between the wiper strip and the glass insufficient, resulting in the inability to scrape the glass clean. Affect the driver's field of vision, bring safety hazards, and cannot meet the needs of the market
The service life of existing rubber wiper strips is relatively short, which is mainly related to rain erosion and direct sunlight, especially the exposure of the sun in summer, and the ultraviolet rays are strong, because the ultraviolet wave band is easily absorbed by rubber (the energy of one photon of ultraviolet rays (E = hν) and carbon-carbon covalently close), prompting the rubber carbon-carbon bond to accelerate aging and fracture, showing surface cracks, product strength reduction, hardness enhancement, etc., which in turn makes the rubber wiper strip unusable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The silica gel strip for the wiper comprises an upper silica gel strip and a lower silica gel strip, and the silica gel strip is composed of 90% silica gel, 5% magnesium oxide, and 5% toner by mass fraction; the silica gel strip is composed of a mass fraction of 60% silica gel, 12% black graphite, 6% white graphite, 5% polytetrafluoroethylene, 5% methylsilsesquioxane, 3% 2,2'-dihydroxy-4-methanol Oxybenzophenone, 3% thioxanthone photoinitiator, 3% magnesium oxide, 3% toner.

[0017] A method for manufacturing a silicone strip for a wiper, comprising the following steps:

[0018] Step 1: Mix the raw materials of the upper silica gel strip: mix and stir the silica gel, magnesium oxide, and toner evenly to form the upper silica gel strip blank;

[0019] Step 2: Mix the raw materials of the lower silica gel strip: first stir the silica gel, black graphite, white graphite, polytetrafluoroethylene, methyl silsesquioxane, magnesium oxide, and toner evenly, then continue stirr...

Embodiment 2

[0024] The silica gel strip for the wiper comprises an upper silica gel strip and a lower silica gel strip, and the silica gel strip is composed of 92% silica gel, 5% magnesium oxide, and 3% toner by mass fraction; the silica gel strip is composed of a mass fraction of 65% silica gel, 10% black graphite, 5% white graphite, 6% polytetrafluoroethylene, 6% methylsilsesquioxane, 2% 2,2'-dihydroxy-4-methanol Oxybenzophenone, 3% thioxanthone photoinitiator, 1% magnesium oxide, 2% toner.

[0025] Compared with Example 1, the amount of silica gel is increased, the softness is increased, and the glass is easier to scrape clean, and the amount of 2,2'-dihydroxy-4-methoxybenzophenone is reduced, which weakens the absorption rate of ultraviolet rays. But other performance is not affected.

Embodiment 3

[0027] The silica gel strip for the wiper comprises an upper silica gel strip and a lower silica gel strip, and the silica gel strip is composed of 95% silica gel, 3% magnesium oxide, and 2% toner by mass fraction; the silica gel strip is composed of a mass fraction of 70% silica gel, 8% black graphite, 4% white graphite, 5% polytetrafluoroethylene, 5% methylsilsesquioxane, 2% 2,2'-dihydroxy-4-methanol Oxybenzophenone, 2% thioxanthone photoinitiator, 2% magnesium oxide, 2% toner.

[0028] Compared with the above two embodiments, the amount of silica gel is the largest and the softness is the best.

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PUM

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Abstract

The invention provides a silicone rubber strip for a windscreen wiper. The silicone rubber strip comprises an upper silicone rubber strip body and a lower silicone rubber strip body. The upper silicone rubber strip body is prepared from, by mass, 90%-95% of silica gel, 2%-6% of magnesium oxide and 2%-5% of color powder; the lower silicone rubber strip body is prepared from, by mass, 60%-70% of silica gel, 8%-12% of black graphite, 4%-6% of white graphite, 5%-8% of polytetrafluoroethylene, 5%-10% of methyl silsesquioxane, 2%-3% of 2,2'-dihydroxyl-4-methoxybenzophenone, 2%-3% of a thioxanthone photoinitiator, 1%-3% of magnesium oxide and 2%-3% of color powder. The invention further provides a preparation method of the silicone rubber strip for the windscreen wiper. The prepared silicone rubber strip is good in toughness, high in corrosion resistance, good in softness, capable of effectively wiping glass, not prone to be aged and long in service life.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a silicone strip for a wiper and a manufacturing method thereof. Background technique [0002] Wipers are widely used on the glass of automobiles, trains, trams and other vehicles, and some construction machinery such as cranes are also equipped with wipers, and the most important thing in wipers is wiper strips. Since the wiper strip is in direct contact with the glass, this requires the wiper strip to have good toughness, shapeability and corrosion resistance, so the production of the wiper strip is extremely important. Most of the existing wiper strips are made of rubber, which has poor toughness, shapeability and corrosion resistance, especially the relatively poor softness, which makes the fit between the wiper strip and the glass insufficient, resulting in the inability to scrape the glass clean. It affects the driver's field of vision, brings potential safety hazards, and cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L27/18C08K13/02C08K3/04C08K5/132C08K3/22
CPCC08K3/04C08K3/22C08K5/132C08K13/02C08L27/18C08L83/04B60S1/38B60S2001/3898C08K2201/014C08K2003/222
Inventor 陆耀明
Owner ZHEJIANG YUANCHUANG ELECTRONICS TECH
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