Cross-linked polyethylene composite nano-silica insulation felt and its production method and system

Abstract

The invention relates to the technical field of building materials, in particular to crosslinked polyethylene composite nano silicon dioxide thermal insulation felt and a production method and systemthereof. The crosslinked polyethylene composite nano silicon dioxide thermal insulation felt comprises a nano silicon dioxide thermal insulation felt which comprises a glass fiber felt and nano silicon dioxide aerogel penetrating into the glass fiber felt, and the cross-linked polyethylene pad is bonded with the nano silicon dioxide thermal insulation felt. The invention discloses a production method of a crosslinked polyethylene composite nano silicon dioxide thermal insulation felt. The production method comprises: step 1, preparing nano silicon dioxide slurry; the crosslinked polyethylene composite nano silicon dioxide thermal insulation felt prepared by the production method and the production system of the crosslinked polyethylene composite nano silicon dioxide thermal insulation feltdisclosed by the invention has good thermal insulation, buffering and damping effects; the heat conductivity coefficient is less than or equal to 0.030 w / m.k, the manufacturing time is short, the cost is low, and the building market requirements can be met.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cross-linked polyethylene composite nano-silica thermal insulation felt and a production method and system thereof. Background technique [0002] Now residential buildings are all high-rise buildings. The improvement and improvement of building floor insulation and sound insulation, shock absorption and noise reduction have become inevitable requirements. The materials currently used for floor insulation and shock resistance and noise reduction mainly include: 1. Cross-linked polyethylene, which It is a soft porous foam material made of low-density polyethylene resin, cross-linking agent, foaming agent, etc., which are cross-linked by heating and continuously foamed at high temperature. It has good shock absorption and sound insulation, but the thermal insulation effect is poor. 0.034w / (m.k); 2. Extruded polystyrene board, which is a rigid foam board made of polystyr...

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Problems solved by technology

[0002] Now residential buildings are all high-rise buildings. The improvement and improvement of building floor insulation and sound insulation, shock absorption and noise reduction have become inevitable requirements. The materials currently used for floor insulation and shock resistance and noise reduction mainly include: 1. Cross-linked polyethylene, which It is a soft porous foam material made of low-density polyethylene resin, cross-linking agent, foaming agent, etc., which are cross-linked by heating and continuously foamed at high temperature. It has good shock absorption and sound insulation, but the thermal insulation effect is poor. 0.034w / (m.k); 2. Extruded polystyrene board, which is a rigid foam board made of polystyrene resin after heating and extrusion, also has poor thermal insulation effect, and its thermal conductivity is ≥0.032w / (m.k ); 3. Ceramsite concrete, thermal conductivity ≥ 0.040w / (m.k), poor thermal insulation effect; 4. Inorganic light aggregate thermal insulation mortar, thermal conductivity ≥ 0.12w / (m.k), poor thermal insulation effect; 5. Rigid polyurethane foam , it is a hard porous material made of polyether, isocyanate, etc. by reaction foaming, thermal conductivity ≤ 0.024w / (m.k), good heat preservation, but it is not recyclable and not environmentally friendly; 6. Nano silica gas Gel thermal insulation blanket, which is based on glass fiber felt, industrial water glass or tetraethyl silicate as silicon source, by preparing silica sol, glass fiber felt is impregnated in silica sol, and then coated with silica sol Silica gel is formed in the material and aged, and then made by solvent replacement, normal pressure drying and chemical modification. The prepared nano-silica airgel insulation blanket has a good insulation effect, and the thermal conductivity is ≤0.018w / m.k, but due to long manufacturing time, high equipment and process requirements, and complicated process, the production cost of thermal insulation felt is extremely high and the market demand is extremely low

To sum up, none of the materials currently used for building floor insulation and impact sound insulation can better meet the needs of building floor insulation, shock absorption and noise reduction.

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