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Introduction to Textile Printing
Published in Asim Kumar Roy Choudhury, Principles of Textile Printing, 2023
The fabric is gummed to the blanket at the entry end and moves along with the blanket in an intermittent fashion, one screen-repeat distance at a time. All the colors in the design are printed simultaneously while the fabric is stationary. The screen is brought down on the fabric for the squeeze movement. Then the screens are lifted and the fabric and blanket move on. When the fabric approaches the turning point of the blanket, it is pulled off and passes into a dryer. The soiled blanket is washed and dried during its return passage on the underside of the machine. Hot melt adhesive is used for temporarily attaching the fabric to the rubber blanket. Hot blades are used for attaching and detaching the fabric from the rubber blanket before and after printing respectively. Long tables, typically 20–60 meters long, are used, and some drying unit is attached at the end of printing table for drying the printed fabric.
Physical and Mechanical Properties of Chemically Modified Wood
Published in David N.-S. Hon, Chemical Modification of Lignocellulosic Materials, 2017
An emulsion polymer-isocyanate adhesive, a crosslinked polyvinyl acetate adhesive, a resorcinol-formaldehyde adhesive, a phenol-resorcinol-formaldehyde adhesive, and an acid-catalyzed phenolic-formaldehyde adhesive developed bonds of high shear strength and wood failure at all levels of acetylation in the dry condition. A neoprene contact bond adhesive and a moisture-curing polyurethane hot-melt adhesive performed as well on acetylated wood as untreated wood in tests of dry strength. Only a cold-setting resorcinol-formal-dehyde adhesive and a phenol-resorcinol-formaldehyde adhesive, along with a hot-setting acid-catalyzed phenolic adhesive, developed bonds of high strength and maximum wood failure at all levels of acetylation when tested in a water-saturated condition [34],
New model for the hygrothermal calculation of condensate on the external building surface
Published in Paul Fazio, Hua Ge, Jiwu Rao, Guylaine Desmarais, Research in Building Physics and Building Engineering, 2020
M. Krus, D. Rösier, K. Sedlbauer
The respective experimental setup is shown in Figure 1. As nightly radiation cannot be realized in laboratory testing, dewing of the specimen surface is brought about by super-cooling the test specimen by means of a cooling plate installed on the back. By means of a thermal conduction paste securing an optimal heat transfer to the specimen, the plaster specimens to be tested were put on a cooling block of copper, which was cooled by cooling water circulation. A 1 to 2 mm deep and wide groove was milled in the plaster. A thermal element was fixed in this groove by means of a hot-melt adhesive.
Evaluation of in-situ permeability measurement methods for pervious concrete pavement
Published in Urban Water Journal, 2023
Jiong Zhang, Zhen Wang, Jingying Xiong, Qing Jin, Deguo Hou, Zhijun Song, Yong Shen, Nian Hu
Preventing side leakage is very important for accurate measurement of permeability and permeability coefficient. In this study, silicone sealant and the hot melt adhesive are used for sealing. First use silicone sealant to smear a sealing belt with a width of no less than 40 mm outward along the circumference of the contact between the permeameter and the pavement. After a period of time (about 24 hours), the silicone sealant solidifies and clogs the open pores on the surface of pavement, which has been tested to prevent water escaping from the outside of the permeameter. Then the hot melt adhesive which can quickly solidify in a short time is used to seal the interface between the permeameter and the pavement. It should be ensured that no side leakage appears before the measurement. If water leakage occurs, it should be immediately sealed with hot melt adhesive until no side leakage occurs. Through repeated tests in the field, the best sealing effect can be obtained by this method.
Compressive characteristics of multi-layer warp-knitted spacer fabrics with various interfaces conditions
Published in The Journal of The Textile Institute, 2022
Shuang Yu, Yuyang Lu, Min Luo, Qian Wu, Yong Kang, Pibo Ma
Yao et al. compounded the WKSF and warp-knitted raised fabric to get the auto cushion by hot-melt laminates. The results have shown that the warp-knitted spacer cushion has better air permeability, moisture permeability, tensile strength and compressive performance than the sponge cushion. Cui et al. developed a type of a functional three-layer laminated automobile seat cover fabric through laminate and flame-retardant finishing technologies. The cushion was made of WKSF, linen and polyester knitted fabric bonded by a polyurethane hot melt adhesive powder. Lin et al. designed bioinspired foam composites combining with WKSFs as energy absorption unit in upper layer and nylon fabric as surface layer by one-step foaming. They indicated that WKSFs strengthened the composite surface layer and there was remarkable improvement in energy absorption (Li et al., 2019). Based on this, they made a spring-like sandwich composite by combining multi-layer WKSFs, low-melting polyester nonwovens and modified polyurethane. Due to its excellent impact resilience, it could be used as an excellent buffer material in industrial construction, transportation packaging and sports (Li et al., 2020).
Development of amplification system for point-of-care test of nucleic acid
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Shaolei Huang, Jiageng Wu, Haozheng Dai, Runxin Gao, Hongyu Lin, Dongxu Zhang, Shengxiang Ge
To verify the accuracy and stability of temperature change during nucleic acid amplification, this paper conducted the experiment of temperature testing. The nucleic acid amplification system must provide stable and suitable temperature conditions for PCR and meet the need for rapidity. Therefore, the stable holding time of 72 °C was deleted, but the temperature change velocity was reduced around 72 °C. The specific parameters are shown in Table 3. After adding the sample for nucleic acid amplification, inserted two temperature sensors into reagent chamber to collect temperature data at the same time, and then took the average value to obtain the actual temperature change of the reagent. The interface between temperature sensor and chamber was fitted with hot melt adhesive. The experimental results are shown in Figure 2a. Due to the space limitation of the article, it is not possible to show all the temperature values of 3600 cycles in two groups, therefore, this paper randomly selected 50 liquid temperature change curves during continuous thermal cycles to present, and showed the details of 4 cycles. To evaluate the temperature stability in the cycles, the temperature errors in the denaturation and annealing stages of PCR reactions under different cycles were collected for analysis. The maximum temperature (Max), minimum temperature (Min) and the difference of actual value and target temperature (Diff) of 95 °C and 55 °C during the 1st to 10th, 596th to 605th, 1196th to 1205th and 1791th to 1800th cycles were recorded in Table 4.