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Micro-foaming functional masterbatch composition, preparation method thereof, and refrigerator foam board

A technology of functional masterbatch and foaming masterbatch, which is applied in the field of refrigerator foam board, microfoaming functional masterbatch composition and its preparation, can solve the problems of thermal deformation of base material and large stress of microfoaming material, and achieve Effects of reducing internal stress, uniform and stable foaming, and preventing deformation

Active Publication Date: 2020-03-06
HEFEI HUALING CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a micro-foaming functional masterbatch composition, which aims to solve the problem that the internal stress of the micro-foaming material is relatively large and the substrate will be thermally deformed

Method used

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  • Micro-foaming functional masterbatch composition, preparation method thereof, and refrigerator foam board
  • Micro-foaming functional masterbatch composition, preparation method thereof, and refrigerator foam board
  • Micro-foaming functional masterbatch composition, preparation method thereof, and refrigerator foam board

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preparation example Construction

[0034] In addition, the present invention also provides a preparation method of a micro-foaming functional masterbatch composition, the preparation process of the micro-foaming functional masterbatch composition adopts mixing, extrusion, cutting and cooling methods, and adopts the method of melt extrusion, The compound form of twin-screw extruder and single-screw extruder is used, that is, twin-screw extrusion feeds, and single-screw extrusion pelletizes. Specifically, see figure 1 , the preparation method of micro-foaming functional masterbatch composition comprises the following steps:

[0035] S1. After mixing the first coating resin, sodium bicarbonate and citric acid, put them into the extruder to melt and extrude, then cut into pellets by a pelletizer, cool, screen and dry to obtain foam masterbatches, Wherein, the weight ratio of sodium bicarbonate and citric acid is (50~80):(25~40);

[0036] S2. After mixing the second coating resin, activator and nucleating agent, p...

Embodiment 1

[0041] A micro-foaming functional masterbatch composition, which is formed by mixing a foaming masterbatch and an auxiliary masterbatch at a weight ratio of 2:1, and the raw materials of the foaming masterbatch include 35 parts by weight of LDPE resin, sodium bicarbonate 65 parts and 35 parts of citric acid, the raw materials of the additive master batch include 35 parts of POE, 0.6 parts of stearic acid, 0.7 parts of talcum powder and 0.6 parts of siloxane in parts by weight.

[0042] The preparation method of this micro-foaming functional master batch composition comprises the following steps:

[0043] S1. After mixing 35 parts of LDPE resin, 65 parts of sodium bicarbonate and 35 parts of citric acid in a mixer at high speed for 25 minutes, put them into a twin-screw extruder and melt them under the technological conditions of 135°C and main screw speed of 30r / min Extrusion, the molten material extruded from the twin-screw flows into the single-screw extruder, and the molten...

Embodiment 2

[0047] A micro-foaming functional masterbatch composition, which is formed by mixing a foaming masterbatch and an auxiliary masterbatch at a weight ratio of 1:1, and the raw materials of the foaming masterbatch include 20 parts by weight of LDPE resin, sodium bicarbonate 50 parts and 25 parts of citric acid, the raw materials of the additive master batch include 20 parts of POE, 0.2 parts of stearic acid, 0.5 parts of talcum powder and 0.1 part of siloxane in parts by weight.

[0048] The preparation method of this micro-foaming functional master batch composition comprises the following steps:

[0049] S1. After mixing 20 parts of LDPE resin, 50 parts of sodium bicarbonate and 25 parts of citric acid in a mixer at high speed for 15 minutes, put them into a twin-screw extruder and melt them under the technological conditions of 120°C and main screw speed of 20r / min Extrusion, the molten material extruded from the twin-screw flows into the single-screw extruder, and the molten ...

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Abstract

The invention discloses a micro foaming functional masterbatch composition and a preparation method thereof, and a refrigerator foam board. The micro foaming functional masterbatch composition is formed by mixing a foaming masterbatch and an additive masterbatch according to the weight ratio of 1:1-3:1; the foaming masterbatch comprises a first coating resin, and sodium bicarbonate and citric acid which are dispersed in the first coating resin, and the weight ratio of sodium bicarbonate to citric acid is (50-80) to (25-40); the additive masterbatch comprises a second coating resin, and an activating agent and a nucleating agent which are dispersed in the second coating resin. The two endothermic foaming agents comprising environmental-protection food-grade inorganic foaming agents sodium bicarbonate and citric acid are compounded in proper proportion, environmental protection and no pollution are achieved, and the foaming process can absorb heat in the environment, so that the temperature of a structural member as a substrate is reduced and the deformation of the structural member is prevented; at the same time, citric acid can facilitate improvement of the gas generation amount of sodium bicarbonate, foaming is allowed to be more uniform and stable, and smaller foam aperture is achieved.

Description

technical field [0001] The invention relates to the technical field of foaming, in particular to a microfoaming functional masterbatch composition, a preparation method thereof and a refrigerator foaming board. Background technique [0002] The cell diameter of conventional foam plastics is generally greater than 50mm, and the cell density (the number of cells per unit volume) is less than 106 / cm 3 , these large-sized cells often become the source of initial cracks when stressed, reducing the mechanical properties of the material. In order to meet the industrial requirements of reducing the cost of some plastic products without reducing their mechanical properties, in the early 1980s, scholars at the Massachusetts Institute of Technology developed a cell diameter foaming agent using inert gases such as carbon dioxide and nitrogen as blowing agents. It is a micron-scale foam plastic, with a cell diameter of 1mm to 10mm and a cell density of 109 to 1012 cells / cm 3 Foam plast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/09C08K3/34C08K5/5415C08J9/08
CPCC08J9/08C08J2203/02C08J2323/06C08J2323/08C08J2423/06C08J2423/08C08L23/06C08L23/0815C08L2201/08C08L2203/14C08L2205/02C08L2207/066C08K5/09C08K3/34C08K5/5415
Inventor 沈剑白二雷霍耀楠
Owner HEFEI HUALING CO LTD
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