摘要:
A security attachment for helping to prevent unwanted access to a container slide fastener includes a retainer mounted in proximity to the slide fastener and an elongate toggle pull adapted to be removably secured in a fixed position by the retainer.
摘要:
An apparatus and methods are disclosed to reliably utilize material as close as possible to the end of the primary supply wheel so to minimize the roll waste. An indicator material, such as tape, is positioned on the primary and standby supply wheels at a distance from the end of the roll so that a reader, such as a machine vision system, can detect the presence or absence of the indicator material on the rolls. If the indicator material is present, the machine vision system will initiate a minimal waste splice logic. If the indicator material is absent, the machine vision system will initiate a standard splice logic.
摘要:
A siloxane composition, comprising from 70 to 99 parts by weight of a solid particulate having a median particle size of from 0.1 to 3000 μm and from 1 to 30 parts by weight of a binder having a median particle size of from 5 to 250 μm, wherein the composition is a powder and the binder comprises a siloxane resin having the formula: (R13SiO1/2)w(R12SiO2/2)x(R1SiO3/2)y(SiO4/2)z, wherein each R1 is independently selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, —O═NR2R3, —OR2, —O—R4—OR2, and an epoxy-substituted organic group, wherein R2 is C1 to C8 hydrocarbyl, R3 is R2 or —H, R4 is hydrocarbylene, w+x+y+z=1, y/(w+x+y+z) is at least 0.67, and the siloxane resin has a softening point of from 30 to 115° C.; an agglomerate, and a method preparing the agglomerate.
摘要翻译:一种硅氧烷组合物,其包含70至99重量份的中值粒度为0.1至3000μm的固体颗粒和1至30重量份的中值粒度为5至250μm的粘合剂, 其中所述组合物是粉末,并且所述粘合剂包含具有下式的(R 13 SiO 1/2)w(R 12 SiO 2/2)x(R 1 SiO 3/2)y(SiO 4/2)z)的硅氧烷树脂,其中每个R 1独立地选自氢 ,烃基,取代的烃基,-O = NRR2R3,-OR2,-O-R4-OR2和环氧取代的有机基团,其中R2是C1-C8烃基,R3是R2或-H,R4是亚烃基,w + x + y + z = 1,y /(w + x + y + z)为0.67以上,硅氧烷树脂的软化点为30〜115℃。 附聚物和制备附聚物的方法。
摘要:
A process for the preparation of substantially polycrystalline silicon carbide fibers is provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolysilane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600.degree. C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cm.sup.3. The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2% by weight boron. This incorporation of boron may be accomplished either prior to or during formation of the fibers or during at least one of the infusibilizing or pyrolyzing steps of the process.
摘要翻译:提供了制备基本上多晶碳化硅纤维的方法。 纤维可以制造成具有小直径并且在高温下是热稳定的。 该方法通过由包含甲基聚硅烷树脂的预陶瓷聚合物前体初始形成纤维来进行。 然后将纤维熔融以使其不熔化,随后进行热解步骤,其中将纤维在非氧化气氛中加热至超过1600℃的温度以形成基本上多晶的碳化硅纤维。 通过本发明的方法形成的基本上多晶的碳化硅纤维具有至少75%的结晶度并且具有至少约2.9gm / cm 3的密度。 聚合物前体或纤维含有至少约0.2重量%的硼或其中并入其中。 这种硼的掺入可以在纤维形成之前或期间或在该方法的至少一个不熔化或热解步骤期间完成。
摘要:
This invention pertains to a method for production of polycrystalline ceramic fibers from silicon oxycarbide (SiCO) ceramic fibers wherein the method comprises heating an amorphous ceramic fiber containing silicon and carbon in an inert environment comprising a boron oxide and carbon monoxide at a temperature sufficient to convert the amorphous ceramic fiber to a polycrystalline ceramic fiber. By having carbon monoxide present during the heating of the ceramic fiber, it is possible to achieve higher production rates on a continuous process.