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In order to explore the impact on resistance from the structural parameters of clean filter materials used in air purification, filter resistance testing stand is built to test the selected materials.
Experimental research on material resistance Sample materials.
Properties of sample polyester materials selected in this paper are shown in table 1.
Journal of Huaqiao University (Natural Science), 31(3) (2010) [7] Xiang X D.
Textile material science.

Among these materials, polymers and their composites have gained significant attention due to their versatility, ease of processing, and tunable properties.
However, these additives are synthetic materials.
To turn waste into materials valuable, this work focuses on exploring the use of amethyst as a novel additive to enhance the properties of PVDF-HFP.
The integration of amethyst into polymer matrices presents an intriguing opportunity to enhance the functional properties of the composite materials.
Liu, Improvement of the piezoelectricity of PVDF-HFP by CoFe2O4 nanoparticles, Nano Materials Science. 6 (2024) 201–210. https://doi.org/https://doi.org/10.1016/j.nanoms.2023.03.002

(1) The impact power absorption increased with the fiber content in material It indicated that the impact toughness of materials were also increased.
The softer materials, the better performance of impact energy absorbing, so is the cushion performance.
(3)The main compositions of the biomass buffer material are biodegradable, and there is no difficult degradable macromolecular materials be added in.
The biomass cushion material is an ideal replacement of materials that cannot be degraded.
References [1] Kyrikou Ioanna., Briassoulis Demetres., Journal of Polymers and the Environment, Vol.15 (2007), p.125-150

What is materials physics,anyway?
Journal of Materials Engineering. 2002, 6: 3-6
Physical metallurgy and materials, 1993, 24A: 2531
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1993, A172(1-2): 63-69
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 1995, A196(1-2): 135-144

A Study on Tactile Friction and Wear -Frictional Wears Characteristics of Human Fingers on Various Soft Materials- Yoshihito ODA, Junji SUGISHITA, Hatsuhiko USAMI, and Tomokazu HATTORI Department of Materials Science Engineering, Meijo University, 1-501 Shiogamaguchi, Tenpaku, Nagoya468-8502, Japan Key words: Friction coefficient, Specific wear rate, finger, stratum corneum, Soft metal, Wood.
The tactile wear is an abrasion phenomenon of solid material by the human skin, and the friction coefficient is several times higher than the usual values obtained among engineering materials[3,11].
We also carried out the similar experiment on several wood materials in which the specific gravity differs.
Therefore, it is understandable to have a small friction coefficient as weak materials such as paulownia and balsawood.
[8] K.Nakajima, Y.Imada, H.Narasaka, N.Mohri and M.Saito: Evaluation of Skin Surface Associated with Morphology and Friction Coefficient, Journal of the Surface Science Society of Japan, (in Japanese), 5 (1984), p.28-34

Introduction Disperse and powder materials of various origins are in great demand in a wide range of industries.
The complexity of studying the surface of dispersed inorganic materials of an amorphous structure or materials of organic origin is caused by the need to identify a surface with a complex chemical structure and unstable composition [18, 19].
Khmyrova, Acid-basic surface properties of dispersed fillers based of metal oxides TiO2, Al2O3, CaO and Fe2O3, IOP Conference Series: Materials Science and Engineering, 708 (2019) 012083 10
Khmyrova, Investigation of the surface properties of quartz-based dispersed materials, IOP Conference Series: Materials Science and Engineering, 1164 (2021) 012021 11
Yavorska, Investigation of surface properties of dispersive fillers based on plant raw materials, Eastern-European Journal of Enterprise Technologies, 5 12(89) (2017) 20−26

Degradable Materials.
As an important component of environment protecting materials, degradable materials are mainly divided into light degradable type and additive light degradable materials.
Secondary Application of Rejected Materials.
New Type Clothing Materials [M].
Journal of Zhejiang Textile Garment Vocational Technical College, 2009(2)

Several studies focus on aluminum honeycomb to metal honeycomb materials [9-11].
Materials and Methods Fiberglass is widely used as reinforcement for thermosets or thermoplastics.
Nguyen, Sandwich structure based composite materials for construction application, Scientific Journal of Thu Dau Mot University 3(38) (2018) 12-18
Nguyen, Eco-friendly Materials of Polymer Composites Based on Water Hyacinth Fibers/Roving.
Wang, Experimental investigation into the cushioning properties of honeycomb paperboard, Packaging Technology and Science: International Journal 21 (6) (2008) 309-316

Passive damping technology using viscoelastic materials is classically used to control vibrations.
Viscoelastic material among the damping materials is widely used to dissipate the structural vibration energy.
This, in turn, has necessitated the search for better vibration-damping materials [11].
Journal Mechanical Engineering Science, Vol. 20 No 5(1978)
Journal of Composite Materials.

Also polymeric materials have low elastic modulus, thermal conductivity and melting point which make the machining of polymeric materials a challenge [10].
Xiao: International Journal of Mechanical Sciences Vol. 44 (2002), p. 2317-2336 [9] A.J.
Strenkowski: Journal of Manufacturing Science and Engineering Vol. 126 (2004), p. 124 [10] A.J.
Strenkowski: Journal of Manufacturing Science and Engineering Vol. 126 (2004), p. 115 [11] A.
Lavrynenko: Journal of Materials Processing Technology Vol. 181 (2007) p. 203-205 [12] V.