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Closed hole-shaped vacuum foam for heat insulation and sound insulation and method for preparing same

A closed-cell, vacuum technology, applied in heat preservation, pipeline protection, pipeline protection through heat insulation, etc., can solve the problems of increasing the cost of use, disappearing heat insulation effect, etc., and achieve improved heat insulation and sound insulation performance, smooth appearance, high vacuum degree of effect

Inactive Publication Date: 2010-06-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of open-cell foam, any damage will lead to the loss of thermal insulation effect, which limits its application and increases the cost of use.

Method used

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  • Closed hole-shaped vacuum foam for heat insulation and sound insulation and method for preparing same
  • Closed hole-shaped vacuum foam for heat insulation and sound insulation and method for preparing same
  • Closed hole-shaped vacuum foam for heat insulation and sound insulation and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Place the PMI rigid foam sample in an environment with a vacuum degree of 0.101325MPa at 80°C for 1 hour to obtain a closed-cell vacuum foam;

[0035] 2) Put the vacuumized PMI foam into an aluminum-plastic vacuum bag and seal it with a vacuum packaging machine to obtain a closed-cell vacuum foam for thermal insulation and sound insulation.

[0036] After testing, its thermal conductivity is 0.02W / (m·K), and its sound insulation coefficient is 90% (400Hz-4000Hz).

Embodiment 2

[0038] 1) Place the PMI rigid foam sample in an environment with a vacuum degree of 0.05MPa at 60°C for 200 hours to obtain a closed-cell vacuum foam;

[0039] 2) Put the vacuumized PMI foam into a vinylidene chloride-vinyl chloride copolymer (PVDC) packaging film, and seal it with a vacuum packaging machine to obtain a closed-cell vacuum foam for thermal insulation and sound insulation.

[0040] After testing, the thermal conductivity is 0.032W / (m·K), and the sound insulation coefficient is 88% (400-4000Hz).

Embodiment 3

[0042] 1) Place the PS rigid foam sample in an environment with a vacuum degree of 0.08 MPa at 25°C for 500 hours to obtain a closed-cell vacuum foam;

[0043] 2) Spray a layer of PVDC paint on the surface of the PS rigid foam after vacuuming, and complete the air-tight seal after the coating is formed into a film, and obtain a closed-cell vacuum foam for thermal insulation and sound insulation.

[0044] The tested thermal conductivity is 0.036W / (m K), and the sound insulation coefficient is 75% (400~4000Hz)

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Abstract

The invention provides closed hole-shaped vacuum foam for heat insulation and sound insulation and a method for preparing the same and belongs to the field of novel materials of heat insulation and sound insulation and noise reduction. In the conventional vacuum foam materials, a core material is open-hole foam, and in a process of using the conventional vacuum foam materials, the heat-insulated property of the conventional vacuum foam materials is lost when any part of the conventional vacuum foam materials is damaged. The closed hole-shaped vacuum foam for heat insulation and sound insulation, provided by the invention, consists of the closed hole-shaped vacuum foam with a closed hole rate of no less than 10 percent, a density of 0.002 to 0.5g / cm3 and a vacuum degree of 0.03 to 0.101325MPa, and a metallic material or high molecular material vapor-proof layer coated on the surface layer of the closed hole-shaped vacuum foam. The method comprises the following steps: preparing closed hole foam plastic raw materials, and foaming and forming the raw materials in a vacuum environment or directly vacuumizing the closed hole-shaped foam to obtain the closed hole-shaped vacuum foam; and coating the vapor-proof layer on the surface of the closed hole-shaped vacuum foam to obtain the closed hole-shaped vacuum foam for heat insulation and sound insulation. The closed hole-shaped vacuum foam has the advantages of high strength, excellent heat insulated and excellent insulated properties, smooth appearance, reliable use and simple process.

Description

technical field [0001] The invention belongs to the field of new materials for heat insulation and sound insulation, and in particular relates to a closed-cell vacuum foam for heat insulation and sound insulation and a manufacturing method thereof. Background technique [0002] Commonly used thermal insulation materials include inorganic materials and organic polymer materials. The former includes asbestos, glass fiber and mineral wool, etc., and the latter includes polystyrene, polypropylene, polyethylene, polyethylene and vinyl acetate copolymer, polyurethane (PU), phenolic resin, epoxy resin, urea-formaldehyde resin, unsaturated polystyrene, etc. Esters, polyimides, etc. Among them, PU rigid foam has excellent heat insulation performance and has been widely used in household appliances, petrochemical and construction industries. [0003] Generally, heat-insulating PU rigid foam is composed of a large number of honeycomb micropores. These micropores are independent and d...

Claims

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Application Information

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IPC IPC(8): F16L59/02F16L59/065
Inventor 姜志国胡聪杜卫超潘赏袁振王静
Owner BEIJING UNIV OF CHEM TECH
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