Nylon foamed sheet with high foaming ratio and preparation method thereof

• Main Authors: LUO JINGYUN, MA ANTONG, CUI WEISONG, ZHENG KAIJING, ZHOU HONGFU
• Format: Patent
• Language: Chinese; English
• Published: 15.04.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention relates to a high-foaming-ratio nylon foamed sheet and a preparation method thereof. Comprising the following steps: mixing PA6 resin and a first additive to obtain a first component; mixing thermoplastic resin and a second additive to obtain a second component; a twin-screw extruder and a single-screw extruder are connected in series, a first component is added from a main feeding port of the twin-screw extruder, a second component is added from a side feeding port of the twin-screw extruder, the first component and the second component are mixed through the twin-screw extruder and then enter the single-screw extruder, and the single-screw extruder and the single-screw extruder are connected in series. Extruding the discharged material through a plate die orifice, cooling, sizing and cutting to obtain a nylon plate to be foamed; a to-be-foamed nylon board is placed in a high-pressure kettle, a foaming agent is added, and the high-foaming-ratio nylon foamed board is prepared through a double-gra