Ultraviolet-resistant polyurethane pultrusion guardrail and preparation method thereof
A polyurethane and UV-resistant technology, which is applied in polyurea/polyurethane coatings, coatings, construction, etc., can solve the problems of heavy load, poor UV resistance, and poor corrosion resistance, so as to increase coating adhesion and improve UV resistance The effect of strength, good structural strength
Pending Publication Date: 2022-01-25
CHINA RAILWAY DESIGN GRP CO LTD +1
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AI Technical Summary
Problems solved by technology
[0004] The first purpose of the present invention is to provide a UV-resistant polyurethane pultruded guardrail to solve the disadvantages of the existing guardrail structure such as large load, poor corrosion resistance, and poor UV resistance.
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[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] Combining with the description in the background technology, it can be seen that the existing concrete guardrails, steel guardrails, fiber reinforced composite materials and steel pipe combined guardrails all have some defects, and the emerging polyurethane also has the disadvantage that organic matter is not resistant to ultraviolet rays. Using special polyurethane, the cost It is too high, such as aliphatic polyurethane, so in terms of durability and economy, the application of polyurethane materials in the field of outdoor engineering has certain restrictions.
[0030] In view of...
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The invention provides an ultraviolet-resistant polyurethane pultrusion guardrail and a preparation method thereof, and relates to the technical field of traffic facility protection equipment. The ultraviolet-resistant polyurethane pultrusion guardrail comprises a guardrail main body, a first ultraviolet-resistant protective layer, a second ultraviolet-resistant protective layer and a third ultraviolet-resistant protective layer. The preparation method comprises the steps of preforming, heating in a mold, continuous traction, product cutting and protective layer spraying. According to the ultraviolet-resistant polyurethane pultrusion guardrail and the preparation method thereof provided by the invention, the whole guardrail is made of a large amount of polyurethane materials, so that the guardrail is light and has good structural strength; and the multi-layer ultraviolet-resistant protective layer is used for protecting the guardrail, the ultraviolet-resistant strength of the guardrail is improved, the defect that a polyurethane material is not resistant to ultraviolet rays in outdoor engineering application is overcome, the ultraviolet-resistant protective layer and the guardrail main body are made of the same-series materials, and the adhesive force of the coating is increased.
Description
technical field [0001] The invention relates to the field of protective devices for traffic facilities, in particular to an ultraviolet-resistant polyurethane pultruded guardrail and a preparation method thereof. Background technique [0002] Railway bridge guardrails are part of the auxiliary facilities of railway bridge decks. At present, they mainly include concrete guardrails, steel guardrails, fiber-reinforced composite materials and steel pipe combined guardrails. [0003] From the perspective of application, the weight of concrete guardrails is heavy, which increases the load burden of the bridge body, affects the service life of functional components such as supports, and has poor durability. At present, large areas of concrete railings have been damaged on existing lines, which has had a great impact safe. Although the steel guardrail has a certain durability, its corrosion resistance is entirely achieved by coating. The steel components must be painted regularly. ...
Claims
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IPC IPC(8): E01D19/10C08L75/08C09D175/04B29C70/52B29C70/54
CPCE01D19/103C08L75/08C09D175/04B29C70/52B29C70/525B29C70/545
Inventor 白鸿国孙浩冯利波李宇牛斌苏永华曾志斌刘彦宁王磊张保忠闫建恒马金亮王可心
Owner CHINA RAILWAY DESIGN GRP CO LTD