Application of Nondestructive Testing in Quality Controlling of High-Density Polyethylene Silicore Plastic Duct

2013 ◽  
Vol 470 ◽  
pp. 693-696
Author(s):  
Bai Yan Gong ◽  
Yu Hong Lu ◽  
Juan Ren
Keyword(s):  
Nondestructive Testing ◽  
Product Quality ◽  
High Density Polyethylene ◽  
High Density ◽  
Important Indicator ◽  
Breaking Elongation ◽  
Sampling Inspection ◽  
Weight Impact ◽  
Falling Weight

Some key quality problems has been exposed in several years of quality supervision sampling inspection of industry products for HDPE silicore plastic duct, such as dimension, breaking elongation, performance of falling weight impact and ring stiffness. Quality consistency is an important indicator in evaluating product quality. Nondestructive testing can be used to evaluate the quality of the whole pan and batch of silicore plastic duct, and it will play important role in product quality controlling.

scholarly journals Prolonged Storage of Lemons Using Individual Seal-packaging

1990 ◽  
Vol 115 (2) ◽  
pp. 251-255 ◽  
Author(s):  
E. Cohen ◽  
S. Lurie ◽  
B. Shapiro ◽  
S. Ben-Yehoshua ◽  
Y. Shalom ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Relations ◽  
High Density Polyethylene ◽  
Storage Period ◽  
High Density ◽  
Prolonged Storage ◽  
Citrus Limon ◽  
Plastic Film ◽  
Maturity Indices

`Eureka' lemons [Citrus limon (L.) Burro. f.] treated for commercial storage were held for 6 months at 13C. One-half of the fruits were individually sealed in high-density polyethylene (HDPE) plastic film and half not sealed. The HDPE-seaIed lemons showed little change in the water relations characteristics, while unsealed lemons lost weight and decreased in water potential throughout the storage period. The maturity indices in the two treatments were generally similar during the first 3 months of storage, after which maturation of wrapped fruit was slower than that of the control. The overall marketable quality of the fruit was higher in HDPE-sealed lemons than in unsealed. From these results, it appears feasible to introduce seal packaging in packing lines where lemons will be placed in extended storage.

Preparation and Properties of High-Density Polyethylene/Silica Composites

2011 ◽  
Vol 279 ◽  
pp. 115-119 ◽  
Author(s):  
Jing Long Gao ◽  
Yan Hui Liu ◽  
Shou Dong Wei
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Thermal Degradation ◽  
Yield Strength ◽  
Silicon Dioxide ◽  
High Density Polyethylene ◽  
High Density ◽  
Breaking Elongation ◽  
Silica Dioxide ◽  
Silicon Dioxide Content

High-density polyethylene (HDPE)/silica composites with different silicon dioxide fraction were prepared by the melting blend method. The effects of silicon dioxide content on the thermal properties and mechanical properties were mainly investigated. The results show that the thermal degradation of the composites shifts towards higher temperatures as the concentration of silicon dioxide is increased. With increasing silica dioxide content, the tension yield strength of HDPE/silicon composites increased, but its breaking elongation decreased. When silicon dioxide content is 5 %, the tension yield strength and its breaking elongation are 29.33 MPa and 102.82 %, respectively.

scholarly journals Effect of thawing on the quality of frozen mechanically deboned meat

1990 ◽  
Vol 62 (5) ◽  
pp. 407-415
Author(s):  
L. Riihonen ◽  
P. Linko
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Quality Product

The effect of thawing conditions on the quality of mechanically deboned beef (MDB) and mechanically deboned pork (MDP) recovered using a pressure-based Inject Star deboner was investigated. Samples were recovered using a freshly disinfected machine, and immediately packed in 3 kg portions in high density polyethylene (HDPE)-coated cartons or in Cryovac vacuum bags. Three methods of thawing were used: microwave thawing and thawing at +4°C and at +21°C. All samples were analysed chemically and microbiologically immediately after thawing. Microwave thawing resulted in a better quality product (P

Modelling of stresses and strains in two-layer combined materials at their formation

2019 ◽  
Vol 1-2 (97) ◽  
pp. 12-19
Author(s):  
G.M. Koloskova
Keyword(s):  
High Density Polyethylene ◽  
Bottom Layer ◽  
High Density ◽  
Bottom Plate ◽  
Distribution Dynamics ◽  
Polymer Metal ◽  
First Time ◽  
Practical Implications

Purpose: The aim of the represented study was to model the behaviour of two-layer combined material during its manufacturing. Design/methodology/approach: The model of material layers joining by means of calender method is built in LS-DYNA software on the basis of finite element method. Using the developed model the study of stress and strain condition changes is carried out. Numerical modelling was carried out for two types of two-layer combined materials in similar conditions. First combination was of high-density polyethylene top layer and aluminium foil bottom layer. Second combination was of high-density polyethylene top layer and low- density polyethylene bottom layer. Joining materials had equal thicknesses. Findings: During formation of two-layer combined materials the primary strain always occurs at the bottom plate of the bottom layer. However, the maximum plastic strain will be represented for the layer with lower elastic modulus value. At the point of the highest loading applied to the two-layer combined material the elasticity condition is changed to the plasticity one and the yield process is registered. Practical implications: Multi-layer combined materials are some of the most advanced types of materials. The quality of the joining of the layers, the strains and the stresses arising in their manufacturing process are the main causes of low interlayer strength. It leads to easy exfoliation and destruction of the material. The results of the study may be used to improve the quality of multi-layer combined materials. Originality/value: For the first time the model was developed for the determination of strains and stresses arising during the formation of multi-layer combined materials by means of calendering method. The calculations of the stresses and strains distribution dynamics for two-layer combined materials are represented for polymer-metal and polymer-polymer layers combinations. The results of the study may be of interest to specialists in the field of multi-layer combined materials designing and manufacturing.

scholarly journals Peningkatan Mutu Briket dari Sampah Organik dengan Penambahan Minyak Jelantah dan Plastik High Density Polyethylene (HDPE)

2015 ◽  
pp. 91-96
Author(s):  
Silvia Septhiani ◽  
Eka Septiani
Keyword(s):  
Natural Resources ◽  
High Density Polyethylene ◽  
Alternative Fuel ◽  
High Density ◽  
Cooking Oil

The objective of this research was to looking for the alternative fuel to overcome the limitations of natural resources by using organic garbage and to investigate the improvement quality of biobriket after HDPE and cooking oil addition. Making biobriket with carbonitation organic garbage was a method that is used. The result of the research suggests that the quality of biobriket increased after HDPE and cooking oil addition.  The analysis of water biobriket showed that HDPE was decreased from 13.99% to 13.88% and biobriket of cooking oil is 9.39%. More over the decreasing also happened to the content of the ash, from 25% to 23% biobriket HDPE and 20% to biobriket of cooking oil. Calorific biobriket 4703.27 cal/g, the increasing of HDPE biobriket was 5009.16 cal/g and biobriket of cooking oil 6245.66 cal/g. DOI :http://dx.doi.org/10.15408/jkv.v0i0.3567.

scholarly journals Microstructure Related Fracture Behavior of a Discontinuous Polymer-Polymer Microlayer Composite

1993 ◽  
Vol 2 (4) ◽  
pp. 096369359300200 ◽  
Author(s):  
Q. Yuan ◽  
J. Karger-Kocsis ◽  
K. Friedrich ◽  
M. Grosso
Keyword(s):  
Light Microscopy ◽  
High Density Polyethylene ◽  
Fracture Behavior ◽  
Impact Resistance ◽  
High Impact ◽  
Impact Response ◽  
Out Of Plane ◽  
Impact Bending ◽  
Weight Impact ◽  
Falling Weight

The fracture behavior of a discontinuous microlayer polymer-polymer composite was studied at −40 °C on notched Charpy specimens and unnotched plates in instrumented impact bending and falling weight impact tests, respectively. The microstructure of the specimens, containing discontinuous layers of modified polyamide (PA; Selar®, Du Pont), more or less uniformly stacked and well overlapping, in a high-density polyethylene (HDPE) matrix, was assessed by light microscopy. Failure mode of the microlayered specimens was studied by fractography. It was concluded that the in-plane impact response of this discontinuous microlayer composite is superior to the out-of-plane one. In addition, a fine and regular microstructure imparts to a high impact resistance.

Dielectric Properties and Relaxation Behavior of High Density Polyethylene (HDPE)

2015 ◽  
Vol 799-800 ◽  
pp. 1319-1324
Author(s):  
F. Benabed ◽  
Tahar Seghier
Keyword(s):  
Dielectric Properties ◽  
Dielectric Response ◽  
High Density Polyethylene ◽  
Chemical Structure ◽  
High Density ◽  
Dielectric Relaxation Spectroscopy ◽  
Dielectric Studies ◽  
Frequency Range ◽  
Wide Range

The method of dielectric spectroscopy is an instrument of choice for the diagnosis of insulation used in high voltage and also to assess the quality of the insulation of HV equipment such as transformers, cables, capacitors, etc...This method allows to estimating the state and the quality of the insulation using the dielectric response of the frequency range. In this article, we have presented results of dielectric studies in high-density polyethylene (HDPE) by means of dielectric relaxation spectroscopy (DRS) in frequency range 10-2 - 106 Hz and temperature between-60 and 60 °C, we will invest this method to measure the dielectric properties and evaluate the performance of this insulator witch has always been chosen as a model polymer material because it is the simplest polymer with respect to its chemical structure and is used in a wide range of applications in daily life.

scholarly journals Optimization of ultrasonically welded High density polyethylene with Medium density polyethylene

2021 ◽  
Author(s):  
Vignesh Asokan ◽  
Venkat Prasanna
Keyword(s):  
Mechanical System ◽  
High Density Polyethylene ◽  
Hold Time ◽  
Ultrasonic Welding ◽  
High Density ◽  
Medium Density ◽  
Acoustic Vibrations ◽  
Strong State ◽  
Weld Time

Abstract Ultrasonic welding is a mechanical system whereby high-recurrence ultrasonic acoustic vibrations are privately connected to workpieces being held together compelled to make a strong state weld. It is usually utilized for plastics, and particularly for joining disparate materials. The point of the undertaking is to examine the quality of weld when unique materials are welded together. The sort of weld will rely upon an on-hold time, weld time, weight, and recurrence. Materials utilized will be HDPE (High Density Polyethylene) and a blend of HDPE-LDPE which is termed as MDPE (Medium density polyethylene). Diverse materials have distinctive properties and thus making a joint with wanted properties will give a better outcome. If one material has properties like better elasticity, pressure quality and other material have properties like pliability and flexibility and so forth then the blend of these materials will have properties of both the materials and when these kinds of materials are welded ultrasonically, they give a better outcome. Subsequently we will get a material which will give better quality with ease. Likewise, the material will be increasingly adaptable.

scholarly journals Improving the Quality of Pyrolysis Oil from Co-firing High-density Polyethylene Plastic Waste and Palm Empty Fruit Bunches

2018 ◽  
Vol 9 (7) ◽  
pp. 1498
Author(s):  
Eny Kusrini ◽  
Dijan Supramono ◽  
Volkan Degirmenci ◽  
Saeful Pranata ◽  
Aji Agraning Bawono ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Plastic Waste ◽  
High Density ◽  
Pyrolysis Oil ◽  
Empty Fruit Bunches

scholarly journals Clinical field follow-up of high density polyethylene (HDPE)-Jaipur prosthetic technology for trans-tibial amputees

2004 ◽  
Vol 28 (3) ◽  
pp. 230-244 ◽  
Author(s):  
J. S. Jensen ◽  
J. G. Craig ◽  
L. B. Mtalo ◽  
C. M. Zelaya
Keyword(s):  
Patient Satisfaction ◽  
High Density Polyethylene ◽  
High Density ◽  
Technical Quality ◽  
Training Course ◽  
Fitting In ◽  
And Training ◽  
Better Than

The purpose of this study was to examine the outcome of the application of the High Density Polyethylene (HDPE)-Jaipur prosthetic construction in fitting trans-tibial amputees in a number of projects in the developing world. Projects in Honduras, Uganda and India were visited. Three hundred and twenty (320) patients had been provided with a HDPE-Jaipur prosthesis and of these 172 were seen for a technical and clinical follow-up after a median of 35 months. More than half the amputations were due to trauma, the remainder to disease. Fabrication and fitting in the three projects was carried out by individuals who had undertaken a twice week training course provided by Bhagwan Mahaveer Viklang Sahayata Samiti limb centre in Jaipur. The individuals involved had limited background training in prosthetics. Craftsmanship and fit were assessed as being poor in 56% of cases. The technical quality of the Jaipur foot was considered acceptable as its performance was better than previously observed results. Although there was patient satisfaction of 85% and compliance of 94% the HDPE-Jaipur trans-tibial system was not considered acceptable as 49% reported walking distances less than 1km and 36% 'discomfort. The major inadequacy in outcome relates to the use for fabrication and fitting of individuals with inadequate education and training.

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