PPR insulating composite tube for home decoration and preparation method of composite tube

Abstract

The invention relates to a PPR insulating composite tube for home decoration and a preparation method of the composite tube. The composite tube is of a three-layer composite structure, the inner layer of a PPR or PPR aluminum-plastic composite tube is coated with an expanded polyethylene insulating layer through equipment, the expanded polyethylene insulating intermediate layer is coated with a weather-resistant and scratch-resistant outer protection layer through an extruding machine, closed-cell expanded materials are adopted by the expanded polyethylene insulating layer, the cell sizes range from 0.2 mm to 0.5 mm, and the weather-resistant and scratch-resistant layer is prepared from 60%-90% of LLDPE, 5%-15% of HDPE, 4%-20% of EVOH, 0.5%-2% of silane-modified nano-titanium dioxide and 0.5%-2% of compound additives. The expanded polyethylene insulating layer is obtained through a one-step method. The PPR insulating composite tube has the insulating and energy saving properties and the excellent weather-resistant and scratch-resistant properties, a synchronous coating molding process is adopted in the production process, the production efficiency is improved, the manufacturing cost is reduced, and the PPR insulating composite tube has a good market application prospect.

Description

technical field [0001] The invention belongs to the technical field of heat preservation of plastic pipes, and in particular relates to a PPR heat preservation composite pipe for home decoration and a preparation method thereof. Background technique [0002] Modern home improvement pays more and more attention to the safety, comfort and energy-saving effect of pipeline concealed installation projects. For example, the insulation and energy saving of daily hot water pipelines, the prevention of freezing and cracking of pipelines in winter, and the prevention of "condensation" in pipelines in high-temperature and high-humidity environments in southern summer all urgently require the development and application of thermal insulation composite pipelines. In some suspended ceilings and outdoor surface installation conditions, pipes are required to be weather-resistant, scratch-resistant and rigid at the same time. Traditional rubber and plastic insulation materials and installat...

AI Technical Summary

Problems solved by technology

Traditional rubber and plastic insulation materials and installation methods still have some defects: 1. On-site suit construction is inconvenient, resulting in loose fit and affecting the insulation effect; 2. Rubber and plastic materials are easy to absorb moisture and have poor insulation effects, and are prone to aging and short service life; 3. .There is no protective layer on the surface, it is easy to scratch when passing through the wall

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