High-temperature-resistant and low-temperature-resistant soft sound insulation material and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant and low-temperature-resistant soft sound insulation material. Vinyl elastomers (ethylene and alpha-olefin block copolymers), styrene block copolymers and damping elastomers are mainly used as base materials. The preparation method comprises the following steps: adding the raw materials into a preheated internal mixer for shearing and plasticizing, conveying the plasticized materials into a screw extruder, performing screw plasticizing, extruding the materials, extruding, stretching and shaping to obtain the high-temperature-resistant and low-temperature-resistant soft sound insulation material. In the high-temperature-resistant and low-temperature-resistant soft sound insulation material, the low-temperature glass transition temperaturesof the ethylene and alpha-olefin block copolymers and the styrene block copolymers are both-70 to-60 DEG C, and the low-temperature glass transition temperature of the damping elastomers is-80 to-60DEG C, so that the sound insulation material is ensured to have very excellent low temperature resistance; meanwhile, the ethylene and alpha-olefin segmented copolymers and the styrene elastomers arerelatively high in melting temperature, so that the sound insulation material is ensured to have excellent high-temperature resistance.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes various types of flexible acoustic insulating films made from polymers called polyvinylenes and polystybers. These film structures provide superior properties such as heat stability, impact strength, stiffness, waterproof property, lightweightiness, and ease of installation on substrates like rails without adding any extra components. They may include different levels of fillings depending upon their desired level of rigidity. Overall these characteristics make them ideal candidates for applications where durability needs outperformance over traditional methods involving expensive chemical agents or physical processes.

Problems solved by technology

This patented describes various types of noise absorbing/absorption materials such as foamable compositions made from different components including vinyl ester monopolyaccharides (VAMs)/EVOH), amphiphatic solvents like dimmers, aliphatically unsaturated oils, epoxy compounds, etc., while also containing certain chemical substituents called crosslinkings. These chemistries help maintain the desired physical property characteristics of the composite without losing any functionality over time. Additionally, the composition needs to exhibit excellent durability against heat exposure, resistant to impact force, flexible enough to allow for bent shapes, and does not crack easily if exposed too much pressure.

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