How to Select An Excellent Squeegee for Your Tingting Work?
www.TintingTool.com / 2016-05-06 14:40
Of all the components of window tinting,squeegee is one of the most important tinting tools.
Squeegees are made from 3 basic types of materials: Rubber, Neoprene, and Polyurethane. The least expensive Squeegees available are those constructed of natural rubber. While commonly used in the education part of the screen printing industry, rubber tends to suffer from poor abrasion resistance and poor resistance to strong solvents. Neoprene, a synthetic rubber compound made from a chroline derivative of acetylene, is also a popular Squeegee material. Neoprene is slightly more expensive than natural rubber, and it offers better chemical and abrasion resistance.
Polyurethane, a syntethic plastic material, is often used to make Squeegee designed for extended use, and for automatic and semi-automatic equipment. While urethane is more expensive than rubber or neoprene, it offers a much better resistance to both physical and chemical abrasion. Most urethanes used in the screen printing industry are MDI based Polyester. The reason being the MDI urethanes offers the best abrasion resistance of any urethane on the market. Polyurethane Squeegees are the most popular of all Squeegees. They are cast in liquid form in open molds, close molds or centrifuges. The material is a thermoset plastic, and cures when exposed to heat for a period of time. The material is made in sheets or individual sections, and then cut to size for shipping. The most common sizes are the following: 3/8 x 2 for general Screen printing(graphics, textile, glass, electronics), 3/16 x 1 for bottle, cd, and high speed automatic presses.
Durometer:When selecting a Squeegee, the first task is to determine your desired durometer, or hardness. The durometer is the value that reflects the physical hardness of the Squeegee material. The Squeegee durometer values from 50A to 95A. This is measured by a durometer gauge, and measured based on standards established by ASTM procedures. (American Standard Testing materials) . For the sake of simplicity, we will call soft - 60A, medium - 70A, and 80A - a hard Squeegee, and 90A -extra hard. Plastics/Squeegees are measured in various scales of hardness. Shore A scale is the most widely used for measuring Squeegee material. The values are based on readings There are many different styles of durometer gauges available on the market. All of the durometer gauges on the market have a dial indicator with a small needle head that measures the hardness of the Squeegee. A durometer gauge is identical to a tension meter. Like a tension meter, a durometer gauge should be calibrated on a regular basis. (1 time per year). The small needle head penetrates into the material, and indicates the hardness of the rubber.
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