The apparatus of the invention includes: an acquisition unit 101 that acquires input information including resin properties and acquires, as output information, a specified value of a physical quantity related to a kneaded resin or a kneading machine; a storage unit 16 that stores a knowledge file 162 containing correlations among the input information, the physical quantity and a plurality of screw configurations; and a search unit 106 and a configuration generator unit 107 together that infers, on the basis of the input information and the knowledge file 162, such a screw configuration that is able to meet the specified value.

The invention relates to a method for calibrating adjusting means (120) for adjusting a nozzle slot (112) of a discharge nozzle (110) for a film track (FB) on a flat film machine (100), comprising the following steps: specifying a calibration position (KP) for the adjusting means (120), performing a controlling intervention to change the adjusting position (SP) of the adjusting means (120), acquiring the reaching of the calibration position (KP) of the adjusting means (120).

A method of additive manufacturing of a three-dimensional object, comprises: sequentially dispensing and solidifying layers to form on a surface a sacrificial structure. In embodiments the sacrificial structure comprises a bulk volume and heating cells embedded in the bulk volume, where the heating cells release more heat than the bulk volume upon the solidification of the layers. In embodiments, the sacrificial structure comprises pinning structures embedded in the bulk volume. The method also comprises sequentially dispensing and solidifying layers to form the three-dimensional object on a portion of the sacrificial structure.

A method and a facility produce polylactide (PLA) by polymerization, in which a lactide mixture is mixed with at least one catalyst, is introduced into a modular planetary roller extruder and the finished PLA is then removed. The lactide mixture continuously passes through segments of the extruder. The course of the reaction is measured and controlled in the segments in a targeted manner such that the temperature can be set by heating and/or cooling. The pressure can be variably set depending on pressure values to be checked by a controllable gas extraction and/or a controllable extruder speed and/or static variability of the planetary rollers and/or a variable metering speed of the lactide mixture and/or a variable mixing ratio of the lactide mixture. Flammable gas is removed in an explosion-protected zone in a partial region of the extruder. Additives are introduced into the extruder during the rolling process.

A production device for melt-blown non-woven fabric, with which a high molecular weight polymer can be reduced in molecular weight by applying a shear force to the high molecular weight polymer without adding an additive such as a peroxide that promotes thermal decomposition reaction, and a low molecular weight polymer can be efficiently produced. The low molecular weight polymer and the melt-blown non-woven fabric are produced using a continuous high shearing device that applies a shear force to the high molecular weight polymer serving as a raw material by rotation of a screw body 37 to reduce the molecular weight of the high molecular weight polymer so as to obtain a low molecular weight polymer, and cools the low molecular weight polymer by passing the low molecular weight polymer through a passage 88 arranged in the axial direction inside the screw body 37.

The invention relates to a method for switching the production of a flat film machine (100) from a feed product (EP) to a follow-on product (FP), comprising the following steps: recognizing a switching request for a switch from the feed product (EP) to the follow-on product (FP), determining a current feed control value (ES) of at least one control variable (SG) of the flat film machine (100) for the feed product (EP), determining a follow-on control value (FS) of the same at least one control variable (SG) for the follow-on product (FP), generating a control signal (SS) for a defined variation of the at least one control variable (SG) of the flat film machine (100) from the feed control value (ES) to the follow-on control value (FS).

In the manufacture of double-walled corrugated extruded pipe it is desirable to form an integral connecting cuff that is of a single wall thickness and typically of a large diameter. The mold blocks and process parameters for forming of the cuff as part of an otherwise double-walled pipe requires a transition as the cuff moves past the die outlets. The present invention allows for accurate sensing and control of air pressure and temperature as the cuff moves past the die outlets. Improvements in both the die tooling and the method of manufacture are disclosed.

The invention discloses a preparation method of highly transparent self-adhesive PBAT cling film. The raw materials include PBAT, ACR, glycerin, and glycerin fatty acid ester; the preparation methods include mixing, preparing pellets, film blowing, and film winding. In the invention, ACR is added into PBAT resin, which increases the ductility, shrinkage property and flatness of winding of PBAT cling films; glycerin can improve the extrusion stability, softness and adhesion properties of PBAT cling films; glycerin fatty acid ester can improve the anti-fog property of PBAT cling films; meanwhile, glycerin and glycerin fatty acid can play a synergistic role to further enhance the anti-fog property of PBAT cling films. The PBAT cling film prepared by the invention has superior physical property, high transparency, high adhesion property, high shrinkage property, smooth flatness of winding free of wrinkles and good air permeability.

The invention relates to a method for monitoring a film quality in the production of a plastic film, comprising the following steps: —determining a first temperature (10) of a film material (1) of the plastic film during a transport of the film material (1), in which the film material (1) is cooled along a conveying direction (2) of the film material (1). The invention further relates to a film machine (50) comprising a device for monitoring a film quality in the production of a plastic film.

A novel process is disclosed for extruding an absorbable glycolide/lactide block copolymer into multifilament suture fibers. The block copolymer preferably consists of about 50/50 mole % of Glycolide/Lactide in the center segment and the overall composition of the copolymer is about 90/10 mole % Glycolide/Lactide. The novel extrusion process comprises the steps of maintaining the temperatures of at least two, preferably three or more, of the extrusion zones in the range of about 5-50° C. below the polymer melting point. The multifilament suture made with the invention process from the segmented, glycolide-rich, poly(glycolide-co-lactide) copolymers of A-B-A type, where the B-segment is an amorphous prepolymer of glycolide and lactide in the molar ratio of about 50/50 glycolide/lactide, exhibit exceptionally high breaking strength retention (BSR) at 42 days post-implantation.