The Influence of Blowing Agent Addition, Glass Fiber Filler Content and Mold Temperature on Selected Properties, Surface State and Structure of Injection Molded Parts from Polyamide 6

Abstract

The effects of blowing agent and glass fiber addition and also mold temperature on selected properties of PA6 molded parts was presented in this work. Blowing agent was dosed to plastic in amounts 0.5 – 1%, and glass fiber was added in amounts 15 – 30%. Furthermore, molded parts from unfilled and unfoamed PA6 was also investigated. The experimental plan was prepared using Design of Experiments (DoE) method. The results of selected part properties: molded parts weight, thickness, hardness, impact strength, tensile strength, elongation at maximum force, and also surface state of molded parts (gloss and color) was presented. The article also presents microscopic investigations (using SEM method) of molded parts with blowing agent and glass fiber. It was found, that the glass fiber content has a larger impact on mechanical properties of parts than addition of blowing agent. The use of the blowing agent in an amount of 1% wt. will allow the reduce injection cycle time by reducing the hold pressure and hold time, without significant worsening their properties. The mold temperature has an impact especially on the gloss of molded parts and the pore size.

The influence of blowing agent addition, talc filler content, and injection velocity on selected properties, surface state, and structure of polypropylene injection molded parts

“…The properties of porous molded parts and their structure depend on many parameters of the injection molding process, such as mold temperature, injection temperature, injection pressure, melting temperature, hold pressure, hold time, backpressure, suck-back, and so on as well as on the shape and dimensions of the mold cavity and length of the runners. 1 -17…”

“…thermal conductivity), and appearance features. 15 -27 Modifications may be conducted in a chemical, physical, or physico-chemical way. The main goal of the polymer modification may be to improve the mechanical properties (e.g.…”

“…This work is a continuation of the investigations of the influence of blowing agent addition and injection conditions on selected properties, surface state, and structure of injection molded parts, presented at work. 15 Some research methods and research description are similar to the work described above. The main aim of the work 15 was to evaluate the influence of the blowing agent addition, glass fiber addition, and mold temperature on PA6 molded parts properties, their thickness, weight, hardness, impact resistance, tensile strength, elongation at maximum force, surface state (color and gloss), and structure.…”

Properties of polypropylene composites filled with microsilica waste

“…Processing shrinkage can be reduced through chemi cal [13,14] or physical [15,16] foaming of the polymer material. However, a modification of the molding parts structure may be accompanied by deterioration of me chanical properties such as tensile strength or impact re sistance [17,18].…”

Improving the effectiveness of the mechanical recycling processes of thermoplastics with a porous structure

“…Procesy składowe recyklingu mechanicznego są badane i analizowane w literaturze od ponad 40 lat [1,2,6,8,9]. Rozwój istniejących technologii i poszukiwanie nowych sposobów ponownego wykorzystania polimerowych tworzyw wtórnych jako pełnowartościowego materiału wtórnego, jest konsekwencją ciągłego wzrostu masy produkowanych i przetwarzanych tworzyw polimerowych, a także coraz bardziej zaawansowanych konstrukcyjnie i złożonych strukturalnie wytworów, w tym również porowatych [13][14][15][16][17][18][19][20][21]. Konieczne jest więc ciągłe doskonalenie technologii, konstrukcji maszyn i instalacji do odzyskiwania potencjału materiałowego tkwiącego w przeznaczonych do recyklingu tworzywach.…”