摘要:
The invention relates to processes for preparing derivatized and partially derivatized polymethacrylimides. The properties of the material can be adjusted by appropriate selection of the derivatization, in terms of number and type.
摘要:
The present invention relates to compositions for producing poly(meth)acrylimide foams having reduced flammability which comprise ammonium polyphosphate and/or zinc sulphide. Furthermore, the present invention also provides poly(meth)acrylimide moulding compositions and also poly(meth)acrylimide foams obtainable from the abovementioned compositions and moulding compositions. The present invention further relates to processes for producing poly(meth)acrylimide foams having reduced flammability.
摘要:
By using a high molecular weight syrup phase comprising PMMA or PMMI, it is possible to distribute fillers in the polymerization batch so that the distribution of the fillers remains homogeneous during the polymerization. A homogeneous foam results.
摘要:
The invention relates to an improved method for producing foamed material, especially poly(meth)acrylimide foams, which are foamed from polymer plates produced according to the casting method. The two-step method consists of a pre-heating step and at least one foaming step. The product obtained has a significantly smaller compressive strain, measured according to DIN 53425(ASMD 621), than prior art products.
摘要:
The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.
摘要:
A feed mechanism in which a ram (2) fed from a hopper (1) compresses a fuel against a closed valve (11) which is then opened for the ram to push the fuel towards a rotary scroll (6) for delivery to a processing vessel.
摘要:
The invention relates to a machining apparatus (1) having a frame (2) for the machining of a workpiece (3) that has a tool holder (4) that is mounted such that it can be shifted in a straight line in three axial directions (x, y, z) relative to a workpiece support (5) that is mounted beneath the tool holder (4), the workpiece support (5) being designed such that it can swivel the workpiece (3) about at least one axis (A, B). For improving the applicability of the machining apparatus, this machining apparatus according to the invention is characterized by a workpiece-holding table (6) that is designed such that it bridges the workpiece support (5) and can thus be firmly attached to the frame (2).
摘要:
The present invention relates to a method and apparatus for drying particulate materials such as seeds and grains in which an air dryer having a shape of a vertical, cylinder and at least one drying stage with a mesh screen disposed therein with a horizontal mesh screen. An upwardly vertical air flow having a velocity in the mesh openings at least equal or larger than to the suspension speed of the particles to be dried temporarily suspends the particles until enough accumulate to provide sufficient weight or downward pressure for the particles to overcome the upward air flow, pass downward through one or more mesh screens and reach the bottom of the dryer.
摘要:
A pop-up straw having an upper buoyant section and a lower flexible section is mounted within a container. When the container is opened, the upper end of the pop-up straw rises through the opening. The straw is particularly useful with a push in tab easy open end container. A collar which holds the upper portion of the straw is mounted below the opening and just below the downward extension of the tab. Opening the tab pushes downward against the upper end of the straw until the tab clears the upper end of the straw. The upper end of the straws then pops up through the opening.