摘要:
A negative-working radiation-sensitive mixture containinga) a compound which generates a strong acid under the action of actinic radiation,b) a compound having at least two groups crosslinkable by means of acid andc) a polymeric binder which is insoluble in water and soluble or at least swellable in aqueous alkaline solutions,wherein the compound (a) comprises a di-, tri- or tetra-hydroxybenzene which may be further substituted, or a polymer containing a di-, tri-, or tetra- hydroxy phenyl radical, is esterified with respectively 2, 3 or 4 sulfonic acids of the formula R--SO.sub.3 H, and is distinguished by high resolution and high sensitivity over a wide spectral range. It also shows high thermal stability and does not form any corrosive photolysis products on exposure. A radiation-sensitive recording material produced with this mixture is suitable for the production of photoresists, electronic components, printing plates or for chemical milling.
摘要:
Radiation-sensitive polymers, a mixture containing these radiation-sensitive polymers as binder, and a process for the preparation of the radiation-sensitive polymer binders are disclosed. A positive radiation-sensitive recording material containing the radiation-sensitive polymer is also disclosed.
摘要:
A radiation-sensitive polymer and a mixture containing this radiation-sensitive polymer as a binder are disclosed. A process for the preparation of the radiation-sensitive polymer binder and a positive-working radiation-sensitive recording material which is prepared using the radiation-sensitive mixture are also disclosed.
摘要:
A 2,4,6-tris-(2-hydroxyethoxy)-[1,3,5]triazine esterified with two or three arylsulfonic acids or heteroarylsulfonic acids is useful to prepare a positive-working radiation-sensitive mixture which is distinguished by a high resolution and a high sensitivity over a wide spectral range. It also shows high thermal stability and does not form corrosive photolysis products on exposure. A radiation-sensitive recording material which is produced from these esters is suitable for producing photoresists, electronic components, printing plates or for chemical milling.
摘要:
A negative-working radiation-sensitive mixture containinga) a compound which generates a strong acid under the action of actinic radiation,b) a compound having at least two groups crosslinkable by means of acid andc) a polymeric binder which is insoluble in water and soluble or at least swellable in aqueous alkaline solutions,wherein the compound (a) contains a 2,4,6-tris-(2-hydroxyethoxy)-[1,3,5]triazine which is esterified with two or three arylsulfonic acids or heteroarylsulfonic acids, is distinguished by high resolution and high sensitivity over a wide spectral range. It also shows high thermal stability and does not form any corrosive photolysis products on exposure. A radiation-sensitive recording material which has been produced with this mixture is suitable for the production of photoresists, electronic components, printed plates or for chemical milling.
摘要:
The present hinged shield assembly is configured to shield a needle to prevent needlesticks. The assembly comprises a base including a hinge, a first shield and a second shield. The first shield extends from the base and at least partially surrounds the second shield. The first and second shields are configured to pivot about the hinge. In some embodiments a distal end of the first shield is open. In other embodiments the first and second shields include sidewalls with channels extending therealong. The first and second shields are rotatable with respect to one another such that the channels in each may be aligned. In other embodiments the first and second shields are translatable and rotatable with respect to one another.
摘要:
The present disclosure is directed to a catheter insertion device, which has a catheter hub at the proximal end of a catheter, a tubular needle hub, at which a hollow needle is fixed and extends through the catheter hub and the catheter in a ready position such that the needle tip projects over the distal end of the catheter, a protective barrel which is received in the tubular needle hub in the ready position and is releasably connected to the catheter hub, and a pressure spring arranged between the needle hub and the protective barrel and which displaces the needle hub and the protective barrel apart from each other in an axial direction, wherein a manually operable holding member is provided between the needle hub and the protective barrel, and holds the needle hub in the ready position at the protective barrel against the bias of the pressure spring, so that after the holding member is released, the pressure spring moves the needle hub into a protective position in relation to the protective barrel, in which position the needle is positioned in the protective barrel.
摘要:
Protective devices for injection needles or infusion needles that include a needle holder at a proximal end of the needle, on whose shaft a protective element for the needle tip can be positioned and moved, are herein disclosed. The protective element is configured to block the needle tip following an injection to prevent accidental contact therewith. The protective element may be positioned on the shaft in a ready to use position inside a grip part or middle retaining portion, which is also used to activate the protective element over the needle following the injection.
摘要:
Protective devices for injection needles or infusion needles that include a needle holder at a proximal end of the needle, on whose shaft a protective element for the needle tip can be positioned and moved, are herein disclosed. The protective element is configured to block the needle tip following an injection to prevent accidental contact therewith. The protective element may be positioned on the shaft in a ready to use position inside a grip part or middle retaining portion, which is also used to activate the protective element over the needle following the injection.
摘要:
A hypodermic needle assembly configured such that the movement of a needle shield into position to block the needle tip occurs as a direct consequence of a longitudinal force applied by insertion of a syringe plunger is provided. The hypodermic needle assembly according to the present invention comprises a needle, a needle hub, and a safety spring clip assembly, the safety spring clip assembly being configured to automatically launch from the needle hub and slide along the needle until the spring clip meets a needle stop at the needle tip, thus preventing the guard from being removed from the needle shaft. A method of using the hypodermic needle assembly according to the present invention is also provided, which includes the method of launching the spring clip with a syringe having multiple advancing mechanisms.