摘要:
The disclosure relates to a carpet product, a process for manufacturing carpet, and an apparatus used in a carpet manufacturing process. The carpet product is made from tufted polymer filament yarn wherein the individual yarn filaments of the yarn back loops are integrally fused so that the carpet resists fuzzing. The primary backing preferably is modified polypropylene in the fill direction. Further, the primary backing may be coated with a polymer before tufting to adhere or integrally fuse the inside of the fiber tuft to the primary backing. An optional secondary backing is preferably made of tape yarn in both directions. The process includes providing a carpet base having a primary backing penetrated by yarn, applying heat to the underside of the primary backing, extruding a heated sheet of polymer and continuously contacting the heated extruded sheet of polymer with the base. The apparatus includes a source of carpet precursor, a heated cylinder for heating the underside of the carpet, an extruder and a casting roll against which the extruded sheet and heated carpet are pressed.
摘要:
It is an object of the present invention to provide an optical film having low heat shrinkage and a method for producing the same. A heat treatment (60) carrying a biaxially stretched film of a thermoplastic resin (12′) prepared by biaxial stretching in a heated atmosphere is conducted, and/or a heat treatment (70) carrying the biaxially stretched film while bringing the biaxially stretched film into contact with a heating roller (72) is conducted.
摘要:
A method and device for producing of a plastic foil especially a multi-layer stretch film, at which plastic material is extruded from a flat extrusion die and subsequently guided around a cooling roll following in the conveying direction and cooled. The foil is guided between the flat extrusion die and the cooling roll around a temperature controlling roll along a given angle of contact. The temperature controlling roll has a center region and two edge regions. The foil is kept at least in sections at a distance from the temperature controlling roll in the center region by creating an air cushion in the center region between the surface of the temperature controlling roll and the foil by supplying heated air between the surface of the temperature controlling roll and the foil in the center region. The foil is brought into contact with the temperature controlling roll in the edge regions.
摘要:
An improved air cooling method for the production of cast film is shown. The device is intended to increase production rates for film without reducing the level of film gauge control. The devices utilizes a soft box for the bulk of the cooling and a directional source of pressurized air to deflect exhaust air from the soft box from striking the web curtain between the die and chill roll.
摘要:
A system and method for reducing draw resonance of plastic material in the molten state, so-called melt, leaving an extrusion group of a plant for the production of plastic film, includes at least one thermostatically-controlled cylinder, having an embracement angle, of the melt on the cylinder, adjustable on the basis of the process rate, i.e. the linear movement speed of the plastic film, and/or on the basis of the temperature measured in the proximity of or in correspondence with the clamping area of the melt in a thermoforming, calibration and cooling group included in the plant and positioned downstream of the system.
摘要:
There is provided a method for producing a PCTFE film having excellent moisture resistance, good tensile elongation, and excellent formability. Provided is a method for producing a polychlcrotrifluoroethylene film, the method including step (1) of melting and molding polychlorotrifluoroethylene into a film, step (2) of maintaining the formed film at a temperature of 100° C. to 170° C., and step (3) of cooling the film to room temperature after the maintaining, wherein the temperature of the film is not allowed to be 170° C. or lower during an interval between step (1) and step (2).
摘要:
A biaxially oriented polyester film having: an equilibrium moisture content of from 0.1% by mass to 0.25% by mass; a difference between moisture contents measured at 10 cm intervals of from 0.01% by mass to 0.06% by mass; a degree of crystallinity of from 30% to 40%; a concentration of terminal carboxyl groups of from 5 equivalents/ton to 25 equivalents/ton; and a thickness of from 100 μm to 350 μm.
摘要:
A film (5) is extruded from plastic material by means of an extruder. Material is mixed into the plastic (5a) of the plastic film (5) before the extrusion so that cavitation bubbles are formed in the material particles mixed into the plastic (5a) when the plastic film is stretched. The film (5) is orientated by stretching. After the extrusion the plastic film (5) is cooled slowly below the crystallization point of the plastic material before the orientation.
摘要:
A method of producing a microporous plastic film is disclosed. The method achieves various characteristics such as strength while having an excellent appearance grade by using a wet stretching method. The method includes kneading a diluent and a polymer with an extruder to produce a kneaded polymer, discharging the kneaded polymer into a sheet, and stretching the sheet in a conveying direction of the sheet with a plurality of rollers. The diluent is applied to at least one of the rollers and the sheet while stretching the sheet.
摘要:
Method for laying a band of elastomer of given width and given mean thickness on a receiving surface, comprising a step during the course of which a leader of elastomer band of given length, the neutral fibre of the cross section of which has a non-zero curvature, is extruded through a die, the said leader being supported only by its end positioned on the die side, characterized in that the band is orientated in such a way that the concave side of the said neutral fibre faces away from the orientation of the gravitational field, so as to prevent the leader from collapsing under the effect of gravity.