Polyamide foaming material and preparation method of same

A technology of foaming materials and polyamides, which is applied in the field of high molecular polymer material preparation, can solve problems such as limitations in pouring and foaming processes, and achieve the effect of achieving limited foaming

Inactive Publication Date: 2018-03-02
上海德亿化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, whether the polyamide foaming process is kettle foaming, extrusion foaming, or pouring foaming, there are great limitations in the process.

Method used

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  • Polyamide foaming material and preparation method of same
  • Polyamide foaming material and preparation method of same
  • Polyamide foaming material and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] refer to figure 1 The shown process flow is used to prepare the following polyamide foam materials.

[0058] The specific formula includes: 60 parts of polyamide 6 is used as the polyamide skeleton material, and 30 parts of polyamide 11 is used as the polymer rebound material. Lattice layering, in order to utilize the penetration of foaming agent and the melt strength and crystallization rate control during foaming and expansion, so that polyamide with high crystallization and high melting point can be used as the skeleton support in the subsequent foaming material, with low crystallization and low melting point The high-quality polyamide is used as a pressure-resistant and resilient part in the subsequent foaming material. In addition, it also includes 0.5 part of nucleating agent (this embodiment adopts modified nano-calcium carbonate), foaming agent (this embodiment adopts CO 2 with N 2 Combination, volume ratio 1:1) 0.3 parts, auxiliary additives (this embodiment...

Embodiment 2

[0063] refer to figure 1 The shown process flow is used to prepare the following polyamide foam materials.

[0064] The specific formula includes: 97 parts of polyamide 6 are used as the polyamide skeleton material, and 1 part of polyamide 11 is used as the polymer rebound material. In addition, it also includes 0.05 part of nucleating agent (this embodiment uses modified nano-calcium carbonate), foaming agent (this embodiment uses CO 2 and N 2 , volume ratio 1:1) 0.1 part, auxiliary auxiliary agent (this embodiment includes antioxidant, flame retardant and filler) 0.5 part.

[0065] Subsequent process route is basically consistent with embodiment 1.

Embodiment 3

[0067] refer to figure 1 The shown process flow is used to prepare the following polyamide foam materials.

[0068] The specific formula includes: the polyamide skeleton material uses 1 part of polyamide 6, and the polymer rebound material uses 97 parts of polyamide 11. In addition, it also includes 0.01 part of nucleating agent (this embodiment uses modified nano-calcium carbonate), foaming agent (this embodiment uses CO 2 and N 2 , volume ratio 1:1) 1 part, auxiliary auxiliary agent (this embodiment includes antioxidant, flame retardant and filler) 20 parts.

[0069] Subsequent process route is basically consistent with embodiment 1.

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Abstract

The invention relates to a polyamide foaming material and a preparation method of same, wherein the polyamide foaming material is prepared through the steps of: (1) according to predetermined ratio, pre-drying raw materials including a polyamide framework material, a polymer resilience material, a nucleating agent and an assistant aid and feeding the raw materials into a twin-screw extruder to fully melt and mix the raw materials; (2) injecting a foaming agent into the twin-screw extruder so that the mixed hot melt in the step 1) is pushed into a mixer and is further homogenized, and then pumping the mixture to a die head via a melt pump, and finally feeding the mixture to a shaping mold to directly puff-shape the mixture, or cutting the mixture in an underwater pelletizing chamber to formgranules and puff-shaping the granules. Compared with the prior art, the polyamide foaming material has micro-airbag structures and opened foams, so that a winded network is formed and an interpenetration structure is formed. The material has excellent physical properties such as resilience force, has agile buffer feedback, and is good in touch sense and comfort degree. The material is easy to foam and solves a problem of limited foaming of conventional polyamide materials, so that the material is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to the field of preparation of high molecular polymer materials, in particular to a preparation method of a polyamide foam material. Background technique [0002] Thermoplastic polymer elastic materials are widely used in the manufacture of production and living facilities, equipment, tools and consumables. With the development of society to meet the requirements of environmental protection, energy saving and consumption reduction, the demand for lightweight materials has become more and more urgent. Thermoplastic polymer elastic materials have also begun a large number of lightweight experiments and verifications and continued to promote their applications. Such as polypropylene PP foam, polyethylene PE foam, polystyrene PS foam, polyester PET foam, polyamide PA foam and polyurethane TPU foam, etc. Due to the high melting temperature of polyamide, physical blowing agents such as carbon dioxide and nitrogen have low permeability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K9/00C08K3/26C08K3/34C08K3/36C08J9/12
CPCC08J9/122C08J2377/02C08L77/02C08L2205/025C08L2205/03C08K9/00C08K3/26C08K3/346C08K3/34C08K3/36
Inventor 陈乔健郭杨龙
Owner 上海德亿化工有限公司
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