Results 131 to 140 of about 12,858 (159)
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1969
Nylon was the first of the truly synthetic fibres. Its inventor, Wallace H. Carothers, by his work on the synthesis and structure of high molecular weight polymers, added greatly to scientific knowledge and, through the elucidation of the theory of fibre structure, paved the way to the discovery of other commercially useful synthetic fibres.
David Sawers +2 more
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Nylon was the first of the truly synthetic fibres. Its inventor, Wallace H. Carothers, by his work on the synthesis and structure of high molecular weight polymers, added greatly to scientific knowledge and, through the elucidation of the theory of fibre structure, paved the way to the discovery of other commercially useful synthetic fibres.
David Sawers +2 more
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Textile Research Journal, 1957
Treatment with thermosetting formaldehyde resins increases the tendency of nylon to yellow when heated The terminal amine groups of nylon are involved in the discolora tion. These amine groups can be blocked by reaction with urea under normal textile curing conditions in order to produce a fabric with less tendency to yellow.
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Treatment with thermosetting formaldehyde resins increases the tendency of nylon to yellow when heated The terminal amine groups of nylon are involved in the discolora tion. These amine groups can be blocked by reaction with urea under normal textile curing conditions in order to produce a fabric with less tendency to yellow.
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1997
Publisher Summary This chapter focuses on the various types of welding techniques applied to nylon polymer. Almost all the welding techniques that have been developed for thermoplastics may be adopted for Ultramid. Therefore, moldings can be bonded together by ultrasonic, friction, and heated-tool (heat-contact and radiation) welding techniques. Nylon
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Publisher Summary This chapter focuses on the various types of welding techniques applied to nylon polymer. Almost all the welding techniques that have been developed for thermoplastics may be adopted for Ultramid. Therefore, moldings can be bonded together by ultrasonic, friction, and heated-tool (heat-contact and radiation) welding techniques. Nylon
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Journal of Polymer Science, 1958
AbstractThe nitrosation of nylon 66, with the use of four different nitrosating agents, has been investigated. By the more vigorous nitrosating reactions, heterogeneous nitrosation of nylon yarn occurs rapidly and proceeds to completion in a few hours.
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AbstractThe nitrosation of nylon 66, with the use of four different nitrosating agents, has been investigated. By the more vigorous nitrosating reactions, heterogeneous nitrosation of nylon yarn occurs rapidly and proceeds to completion in a few hours.
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1995
Publisher Summary This chapter focuses on various welding methods in context to amorphous nylon. Welding methods, which can be considered, are heated tool welding, vibration and spin welding, and ultrasonic welding. The heating or welding times as well as the joining pressure are part dependent and must therefore be empirically determined.
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Publisher Summary This chapter focuses on various welding methods in context to amorphous nylon. Welding methods, which can be considered, are heated tool welding, vibration and spin welding, and ultrasonic welding. The heating or welding times as well as the joining pressure are part dependent and must therefore be empirically determined.
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Ophthalmology, 1981
The extensive use of nylons as iris fixation sutures and intraocular lens loops has resulted in complication rates of between 0.5 and 19%, depending on the series and postoperative time of examination. The primary reason for failure is chemical degradation of the nylon, particularly in the area posterior to the iris.
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The extensive use of nylons as iris fixation sutures and intraocular lens loops has resulted in complication rates of between 0.5 and 19%, depending on the series and postoperative time of examination. The primary reason for failure is chemical degradation of the nylon, particularly in the area posterior to the iris.
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2006
In Gowler and Legge’s model, achievement and being able to demonstrate achievement, was one of the defining qualities of “management” in the rhetoric of managers. We could suggest that in some ways we would not expect it ever to disappear entirely. But the problem arises of how achievement may be defined and evaluated in a world “which has speeded up ...
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In Gowler and Legge’s model, achievement and being able to demonstrate achievement, was one of the defining qualities of “management” in the rhetoric of managers. We could suggest that in some ways we would not expect it ever to disappear entirely. But the problem arises of how achievement may be defined and evaluated in a world “which has speeded up ...
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Journal of the Society of Dyers and Colourists, 1957
Thiourea‐formaldehyde resins can be used to give a non‐infiammable finish both on nylon net and on nylon dyed with chrome dyes. The mechanism of the flameproofing of nylon is discussed. The effects of flameproofing agents and of chrome dyes on the melting point, the viscosity, and the ignition temperature of nylon are examined.
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Thiourea‐formaldehyde resins can be used to give a non‐infiammable finish both on nylon net and on nylon dyed with chrome dyes. The mechanism of the flameproofing of nylon is discussed. The effects of flameproofing agents and of chrome dyes on the melting point, the viscosity, and the ignition temperature of nylon are examined.
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1995
Publisher Summary This chapter provides information on the ultrasonic welding that is used for joining plastic parts. The parts are placed together and high frequency vibration and pressure are exerted at the joint, which melts the plastic and to cause a weld. This joint can be as strong as the plastic itself.
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Publisher Summary This chapter provides information on the ultrasonic welding that is used for joining plastic parts. The parts are placed together and high frequency vibration and pressure are exerted at the joint, which melts the plastic and to cause a weld. This joint can be as strong as the plastic itself.
openaire +3 more sources