Plasma treatment of plastic film or decorative veneer and its effects on the peel strength and curling deformation of plastic film-reinforced pliable decorative sliced veneer (PR-RP-DSV)

Holzforschung ◽  
2019 ◽  
Vol 73 (3) ◽  
pp. 313-322 ◽  
Author(s):  
Xiaorui Peng ◽  
Zhankuan Zhang
Keyword(s):  
Bonding Strength ◽  
Peel Strength ◽  
Surface Finishing ◽  
Great Decrease ◽  
Plastic Film ◽  
Interface Bonding ◽  
Pressing Time ◽  
Product Surface ◽  
New Type ◽  
Interface Bonding Strength

AbstractA new type of plastic-film-reinforced pliable decorative sliced veneer (PF-RP-DSV) for wood product surface finishing was developed. The plastic film served as both the reinforcing and adhesive material. Consequently, the veneer did not need adhesives during preparation and wood surface finishing. However, the interface bonding strength between the two composite was low and the curling deformation was serious because of the large difference in polarity and thermal expansion coefficient of the two materials. In this paper, low-density polyethylene (LDPE) plastic film (PF) and a decorative sliced veneer (DSV) fromBrachystegia laurentiiwere treated with plasma to improve interfacial adhesion and reduce curling deformation. The plasma-modified (PM) PF and DSV increased the bonding strength of the resulting composites and generated an evenly distributed quasi glue layer between the two materials. The PM-PF had more influence on the interface bonding strength than the PM-DSV. This effect can be attributed to the great decrease in crystallinity and increment of oxygen-containing functional group in the PM-PF. The veneer fromB. laurentiican achieve good gluing performance and small curling deformation at a hot pressing temperature of 120°C, pressing time of 150s and pressing at 0.6 MPa.

Thermal Shock Behavior and Bonding Strength of MoSi2-BaO-Al2O3-SiO2 Gradient Porous Coating with Polymethyl Methacrylate Addition for Porous Fibrous Insulations

2018 ◽  
Vol 281 ◽  
pp. 493-498
Author(s):  
Ya Yu Su ◽  
Xiao Lei Li ◽  
Hui Jie Tang ◽  
Zhi Hao Zhao ◽  
Jian He
Keyword(s):  
Porous Structure ◽  
Thermal Shock ◽  
Bonding Strength ◽  
Thermal Shock Resistance ◽  
Porous Coating ◽  
Bonding Layer ◽  
Interface Bonding ◽  
Shock Resistance ◽  
Thermal Shock Behavior ◽  
Interface Bonding Strength

In order to improve the thermal shock behavior of high temperature resistant coating on porous fibrous referactory insulations, the MoSi2-BaO-Al2O3-SiO2(MoSi2-BAS) gradient porous coatings were designed by preparing a dense surface layer and a porous bonding layer with the method of brushing and subsequent sintering at 1773 K. The porous bonding layer was obtained by adding polymethyl methacrylate (PMMA) as pore former. As the content of PMMA increases, the MoSi2-BAS coatings changed from a dense structure into a gradient porous structure. The interface bonding strength and thermal shock resistance of the MoSi2-BAS coatings were investigated. The result shows that the as-prepared coating with gradient porous structure exhibited excellent thermal shock resistance, which remained gradient structure without cracking after thermal cycling 100 times between 1773 K and room temperature. And the interface bonding strength of the gradient porous coating reached 1.5±0.08 Mpa, which was much better than that of the dense coating.

Study on Preparation and Properties of Recycled Plastic-Poplar Plywood

2011 ◽  
Vol 121-126 ◽  
pp. 2917-2921
Author(s):  
Fang Zhao ◽  
Kun Lin Song ◽  
Wei Gao ◽  
Shuang Bao Zhang
Keyword(s):  
Hot Pressing ◽  
Bonding Strength ◽  
Formaldehyde Emission ◽  
Optimum Process ◽  
Process Conditions ◽  
Plastic Film ◽  
Pressing Temperature ◽  
Pressing Time ◽  
Recycled Plastics ◽  
Peak Value

In this paper, traditional adhesives were replaced by recycled plastics to make poplar plywood by hot-pressing. The results showed that the amount of recycled plastics made no obvious effects on the bonding strength, and the dry bonding strength reached the maximum with the amount of plastic film of 100g/m2. When the hot temperature was 150°C, the bonding strength no longer increased with the temperature, or even decreased. When the pressing time was 5 minutes, the bonding strength achieved the peak value, and then declined along with the extending of time. After testing, formaldehyde emission was found to be very low or zero. The new plywood is a kind of green and environmentally friendly wood-based panels. Above all, it could be concluded that the amount of plastic film of 100g/m2, the hot pressing temperature of 150°C and the hot pressing time of 5 minutes were the optimum process conditions in this experiment.

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