Effect of press force in tensile strength and surface quality of press formed wood plastic composite products

2019 ◽  
Author(s):  
Sami Matthews ◽  
Amir Toghyani ◽  
Panu Tanninen ◽  
Marko Hyvärinen ◽  
Ville Leminen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Surface Quality ◽  
Wood Plastic Composite ◽  
Plastic Composite

Research on Surface Quality Enhancement of Wood-Plastic Composite Powder SLS Parts by Post Processing

2010 ◽  
Vol 113-116 ◽  
pp. 508-511 ◽  
Author(s):  
Wei Liang Zeng ◽  
Yan Ling Guo
Keyword(s):  
Surface Quality ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Wood Plastic Composite ◽  
Post Processing ◽  
Plastic Composite ◽  
Rp Process ◽  
Sintering Properties

According to its advantages, such as low-cost and green biological etc., Wood-Plastic Composite(WPC) is more suitable for make parts by Selective Laser Sintering(SLS) rapid prototyping (RP) process. With optimal design of components, the parts made by WPC have good mechanical properties as well as with good laser sintering properties. In order to further improve the surface quality of the parts, the post-processing–infiltrating with wax–is introduced. After post-processing, the void fraction is decreased from 51% to 7%, surface quality has been greatly improved, Ra belows 13µm on average, after polishing the surface is more smooth and Ra belows 5µm averagely，compared to those without post processing, surface roughness decrease 22% and 73% respectively.

scholarly journals Surface Quality of Wood Plastic Composites as Function of Water Exposure

2020 ◽  
Vol 10 (15) ◽  
pp. 5122
Author(s):  
Cagatay Tasdemir ◽  
Ibrahim Halil Basboga ◽  
Salim Hiziroglu
Keyword(s):  
Surface Quality ◽  
Juniperus Virginiana ◽  
Wood Plastic Composite ◽  
Eastern Redcedar ◽  
Average Roughness ◽  
Water Exposure ◽  
Plastic Composite ◽  
Nano Clay ◽  
Dry Conditions

The objective of this study was to evaluate the surface quality of experimentally manufactured wood plastic composite (WPC) samples exposed to water soaking. Eastern redcedar (Juniperus virginiana L.), which is one of the invasive species in Oklahoma, USA, and recycled plastic were used to manufacture WPC samples. Three types of samples, namely with 0%, 3% and 6% nano-clay were soaked in water for up to one month. Stylus-type equipment was employed to evaluate their surface roughness as a function of water exposure. Two accepted roughness parameters, average roughness (Ra) and mean peak-to-valley (Rz), were used to determine changes in the surface quality of the specimens due to water exposure. Average roughness values of 1.5 µm and 4.1 µm were determined for the samples with no clay in dry conditions and those soaked for one month in water, respectively. Corresponding values were lower in the case of those with clay in their content. Based on the findings in this work, it appears that the stylus technique can be successfully applied to such samples to quantitatively evaluate their surface quality when they are exposed to water for an extended time span. It is expected that data from this work could help to produce a better understanding of the behavior of WPCs under environmental conditions.

Effect of Atmosphere and Holding Time on the Quality of Surface and Mechanical Properties of the Cold-Rolling Plate of Fe-42% Ni (4J42)

2012 ◽  
Vol 560-561 ◽  
pp. 655-660
Author(s):  
Li Juan Li ◽  
Li Hua Liu ◽  
Jing Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Cold Rolling ◽  
Surface Quality ◽  
Annealing Process ◽  
Holding Time ◽  
Annealing Condition ◽  
Nitrogen Ratio

In order to guide atmosphere annealing process in industry, the effect of atmosphere and holding times on the surface quality and mechanical properties of the cold-rolling plate of Fe-42% Ni (4J42) was studied. It is found that in the laboratory, surface qualities of all the samples annealed at different annealing condition are all good enough. When the ratio of hydrogen and nitrogen is below 70%:30%, at different holding time, with increasing of H2 proportion, 4J42’s tensile strength and yield strength all increases, and the hardness declines. And except H2:N2=70%:30, when holding time is less than or equal to 1.2min, at different ratio of hydrogen and nitrogen, holding time will influence 4J42’s mechanical properties little. So combine requires in industry with the experiment results, it can be concluded that for 4J42 alloy, annealing at atmosphere of hydrogen nitrogen ratio is less than 70%:30% for about 1.2min is appropriate to atmosphere annealing process in industry.

The effect of SLM process parameters on density, hardness, tensile strength and surface quality of Ti-6Al-4V

2019 ◽  
Vol 25 ◽  
pp. 176-186 ◽  
Author(s):  
AmirMahyar Khorasani ◽  
Ian Gibson ◽  
Umar Shafique Awan ◽  
Alireza Ghaderi
Keyword(s):  
Tensile Strength ◽  
Surface Quality ◽  
Process Parameters

Study of Surface Quality and Mechanical Properties of Composite Material Based on Natural Reinforcement

2016 ◽  
Vol 821 ◽  
pp. 471-478
Author(s):  
Zuzana Hutyrová ◽  
Dušan Mitaľ ◽  
Marta Harničárová ◽  
Jozef Zajac ◽  
Jan Valíček
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Tensile Test ◽  
Surface Quality ◽  
Bending Test ◽  
Wood Plastic Composite ◽  
Radiographic Method ◽  
Plastic Composite

This paper presents problem of the examination of the inhomogeneity of composite material on the base of wood plastic composite. It deals with evaluation of mechanical properties after tensile test and triax-bending test of a composite were assessed in relation to images acquired from radiographic method – metrotomography (using radiographic method which has an explanatory value in terms of evaluation of volume defects and in a figurative sense, also of the conduct of cracks on the surface after machining).

Effects of Atmospheric Plasma Treatment on the Surface Properties of Wood-Plastic Composites

2013 ◽  
Vol 718-720 ◽  
pp. 176-185 ◽  
Author(s):  
Kimmo Hämäläinen ◽  
Timo Kärki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Contact Angle ◽  
Tensile Strength ◽  
Plasma Treatment ◽  
Atmospheric Plasma ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Plastic Composites ◽  
Scanning Electron

Wood-plastic composites are a group of materials with potential to penetrate markets currently dominated by plastic or wood products. The surface properties of wood-plastic composite materials have been found to be similar to those of polyolefin materials, thereby presenting a challenge to the use of adhesive joining methods. Plasma chemistry can be performed to improve the adhesive properties of polyolefin materials. In this research, the effect of atmospheric plasma treatment on polypropylene and spruce (Picea abies) wood-plastic composite surfaces is investigated by contact angle measurement with sessile drop method and tensile strength tests of glued samples. The plasma treatment is performed on extruded WPC profiles. Confocal Raman microscopy and scanning electron microscopy are used for analysis of the material surface. The results show an increase in the contact angle of plasma treated WPC materials and an improvement in the tensile strength of glued samples following plasma treatment. Observation of the Raman spectrum indicates an increase in polar groups after plasma treatment. Scanning electron microscopy shows changes in the surface of the treated samples, which can be seen as increased porosity, possibly due to etching as a result of the plasma treatment. It is concluded that atmospheric plasma treatment for adhesion improvement of WPC materials can therefore be applied successfully, although it has a mechanical effect on the surface of the material.

Research on Tensile Strength in the Ultrasonic Welding Joint of T-Type Wood-Plastic Composites Components

2012 ◽  
Vol 601 ◽  
pp. 46-49
Author(s):  
Hui Zhao ◽  
Yi Long Zhou ◽  
Hong Yuan Zhu ◽  
Sheng Yuan Zhang
Keyword(s):  
Tensile Strength ◽  
Welded Joint ◽  
Wood Flour ◽  
Ultrasonic Welding ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
Plastic Composite ◽  
Plastic Composites ◽  
Welding Technology ◽  
Scanning Electron

Ultrasonic welding technology is applied to the connection of T-type wood-plastic composites components to study its performance. The wood-plastic composite materials are made up of 60% wood-flour (WF), 36% polypropylene (PP) and 4% maleic anhydride grafted PP (MAPP). Tensile strength of the welded joint, which oscillation time is 4 seconds, is analyzed based on experimental data. Welded joint is observed by scanning electron microscope and its connection status is analyzed. Experiment results show that ultrasonic welding technology can be applied to T-type wood-plastic composites component, which has enough tensile strength.

The Influence of Different Carbon Type Fillers on the Mechanical and Physical Properties of Co-Extruded PP-Based WPC

2014 ◽  
Vol 1025-1026 ◽  
pp. 200-207 ◽  
Author(s):  
Irina Turku ◽  
Timo Kärki
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Tensile Modulus ◽  
Expandable Graphite ◽  
Wood Plastic Composite ◽  
Carbon Fibres ◽  
Thickness Swelling ◽  
Plastic Composite ◽  
Mechanical And Physical Properties ◽  
The Impact

In order to improve the properties of a co-extruded wood-plastic composite (WPC), five different carbon-based fillers, namely graphite (G), expandable graphite (EG), carbon nanotubes (CNTs), carbon black (CB) and carbon fibres (CFs) were introduced into the shell layer of polypropylene (PP)-based WPC. The addition of CB, G, EG and CNTs improved the tensile strength by 45%, 25%, 5% and 32%, respectively; the addition of carbon fibres decreased the tensile strength by 22%. However, the tensile modulus of the composites decreased for all filler types. The incorporation of CNTs and CFs increased the impact strength by 11% and 21%, respectively; the impact strength of CB, EG and G-loaded WPCs decreased by 7%. The incorporation of CB, EG, G, CNTs improved the hardness by 25%, 9%, 25% and 59%, respectively; the addition of CFs decreased the hardness slightly. The wettability of the composite decreased with the CB, CNTs and CFs loadings. The presence of EG increased water absorption, whereas thickness swelling decreased compared to the reference.

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