Polyamide material for preparing cold-resisting heat insulation strip and preparation method of polyamide material

Abstract

The invention provides a polyamide material for preparing a cold-resisting heat insulation strip and a preparation method of the polyamide material. The polyamide material is prepared from the following raw materials in percentage by weight: 30 to 70 percent of polyamide resin, 15 to 35 percent of glass fiber, 3 to 40 percent of toughening agent, 0.2 to 5 percent of antioxidant, 0.5 to 5 percent of viscosity improver and 0.1 to 1 percent of thermal stabilizer. The polyamide material for preparing the cold-resisting heat insulation strip, provided by the invention, can provide the material with good low-temperature toughness, stable linear expansion coefficient and high mechanical property, thereby meeting the need of producing and using the polyamide heat insulation strip under a cold condition.

Description

technical field [0001] The invention belongs to the field of materials used in the construction industry, and in particular relates to a polyamide material used for preparing cold-resistant and heat-insulating strips and a preparation method thereof. Background technique [0002] Heat-insulating broken bridge aluminum alloy window is an improved type introduced on the basis of aluminum alloy window to improve the thermal insulation performance of doors and windows. The aluminum alloy profile is divided into inner and outer parts by reinforced nylon spacers to block the heat conduction of aluminum. At present, the main performance parameters of the national standard for type I heat insulation strips in the heat insulation strip industry are: unnotched impact ≥ 35KJ / m 2 , Elastic modulus ≥ 4500MPa, room temperature transverse tensile characteristic value ≥ 70MPa, glass fiber content 25% ± 2%. [0003] Because it is used in building doors and windows, it involves the use in di...

AI Technical Summary

Problems solved by technology

During the installation process, the relative positioning of the heat-insulating broken bridge aluminum alloy profiles and the heat-insulating connecting strips is poor, and the penetration of the heat-insulating strips is difficult. Usually, machines are required, and problems of breakage and damage often occur, which affect normal use. During the process, there is a gap in the cavity between the heat insulation strip and the aluminum alloy. Under the condition of large temperature changes, there are different shrinkages. This phenomenon is more obvious. The material of the insulation strips of doors and windows is improved

[0004] Therefore, the mechanical properties, cold resistance, and bending resistance of extrusion grade reinforced nylon 66 are highly required, which makes extrusion grade glass fiber reinforced nylon 66 have several technical problems: (1) in cold regions, not because Destroyed by temperature difference, low temperature toughness is better, (2) linear expansion coefficient is stable

Images