Extruded preform and container made of polyethylene terephthalate and method for production thereof

FIELD: manufacturing technology.

SUBSTANCE: invention relates to methods and systems of blow molding with extrusion of polyethylene terephthalate (PET). Extruded PET-preform contains the first extruded polymer containing PET, and the second extruded polymer with characteristic viscosity 0.8–0.87 containing PET. First extruded polymer and the second extruded polymer are extruded together. First extruded polymer has characteristic viscosity higher than characteristic viscosity of the second polymer. Besides, extruded monolayer PET-preform for container blow moulding with extrusion. Extruded multilayer polymer is in hardened condition and has characteristic viscosity from 0.96 to 1.4 and stripped chain extenders.

EFFECT: production of a product with no haze and/or banding, having high strength.

15 cl, 4 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to laminar materials for packages, particularly, to production of laminar re-sealing material. This material comprises substrate ply, soldering ply and glue ply arranged there between. Glue ply represents a thermal adhesive or pressure-sensitive glue with shear rate of 10-150 min at 40°C at the load of 1000 g at 40°C on test site of 12.5 mm × 25 mm. Soldering ply comprises PE copolymer ply and, if required, extra PET, PE ply, say, LDPE and/or PP. This process allows application of thermal adhesive or pressure-sensitive glue, then soldering ply in a single process to produce re-sealing laminar material. Said laminar material can be used as a re-sealing cover at, for example, packing pan.

EFFECT: ruled out film separation.

9 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to polyethyleneterephthalate films, which have increased resistance to hydrolysis. Described is biaxially oriented polyether film, including polyethyleneterephthalate (PET) and at least one hydrolysis stabiliser, selected from glycidyl ether of branched monocarboxylic acid, where hydrolysis stabiliser has formula (I): , where R1 and R2 are independently selected from alkyl, and it is preferable that , at least, one (with only one in one version of implementation) of R1 and R2 is selected from methyl; R3 is selected from hydrogen and alkyl, and preferably from alkyl; and where the total quantity of carbon atoms in alkyl groups R1, R2 and R3 constitutes from 3 to 13; and where said hydrolysis stabiliser is present in film in form of product of its interaction with, at least, any of terminal groups of said polyether. Also described is application of said film as a layer in photovoltaic cell, with said photovoltaic cell containing front panel, electrode layer(s), photoactive layer and back panel, in particular characterised by the fact that said back panel contains said polyether film. Described is photovoltaic cell, consisting of front panel, electrode layer(s), photoactive layer and back panel, in which front panel and/or back panel consists of said film Method of obtaining said film is also described.

EFFECT: obtaining biaxially oriented polyethyleneterephthalate hydrolysis-resistant film, without release of toxic by-products, without increase of film rupture probability.

30 cl, 1 dwg, 3 tbl, 28 ex

FIELD: packaging industry.

SUBSTANCE: invention relates to multilayer materials and relates to thermoformable multilayer films and blister packs made of them. The multilayer structure comprises a first polymeric layer having a first surface and a second surface, where the first polymeric layer comprises a metallised polyethylene terephthalate. The multilayer structure also comprises a second polymeric layer having a first surface and a second surface, where the first surface of the second polymeric layer is located adjacent the second surface of the first polymeric layer, the second polymeric layer comprises cyclic olefin or homopolymer of chlorotrifluoroethylene. The multilayer structure additionally comprises a third polymeric layer having a first surface and a second surface, where the first surface of the third polymeric layer is located adjacent to the second surface of the second polymeric layer. The third polymeric layer comprises polypropylene or polyvinyl chloride. Also the method of manufacturing a multilayer film structure and thermoformed blister pack is proposed.

EFFECT: invention provides creation of high-tech films having moisture resistant properties for use them in blister packs, including smokeless pressed tobacco articles.

30 cl, 4 dwg

FIELD: physics.

SUBSTANCE: laminated structure includes a layer containing a thermoplastic polymer and a layer containing a thermoplastic polymer and a black pigment as a laser radiation sensitive additive. The layer containing a thermoplastic polymer is free of laser radiation sensitive additives and the layer containing a thermoplastic polymer and a black pigment as a laser radiation sensitive additive has a thickness of 5-30 mcm and contains 40-180 ppm of the black pigment.

EFFECT: font information or an image, the definition and resolution of which are better compared to existing systems, can be incorporated into the disclosed laminated structure by laser engraving without deterioration of visual colour effect caused by intense grey colouring of the base material.

13 cl, 4 dwg, 1 tbl, 23 ex

FIELD: chemistry.

SUBSTANCE: container is made of an improved composition based on polyester and polyamide, obtained by coupling a polyamide homopolymer, copolymer or mixtures thereof or mixtures thereof and an oxidisable polydiene or polyether in the presence of polyester and an ionic compatibiliser. The composition also preferably includes a catalyst based on a metal carboxylate.

EFFECT: high reaction capability of oxygen in the presence of ionic compatibilisers of polyesters.

13 cl, 4 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a multilayer film composite, an identification smart card, an identification document, a personal data medium etc, having a multilayer film composite, use of said multilayer film composite, production thereof and a polycarbonate or copolycarbonate composition. The multilayer film composite has at least one layer of polycarbonate or copolycarbonate and is characterised by that the polycarbonate or copolycarbonate further contains one or more additives selected from a group comprising petaerythritol tetrastearate, glycerol monostearate, propanediol stearate, stearyl stearate and mixtures of said compounds. Total concentration of the additives selected from said group ranges from 2.1 to 6% with respect to the weight of the composition.

EFFECT: obtaining a film for producing multilayer systems, having the necessary level of mechanical properties and characterised by a higher layering suitability compared to prior art, high layering adhesion and improved processing properties.

7 cl, 1 tbl, 1 dwg, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of sandwiched materials used in thin-film instruments and devices. Proposed levelling film comprises levelling ply containing binding polymer resin and inorganic filler as components, at least, on one side of transparent polymer substrate. Note here that the number of foreign particles with mean diameter of 20-100 mcm on levelling air surface does not exceed 5 per m2.

EFFECT: decreased amount of linear defects at production of thin-film transistor on film surface.

3 cl, 1 tbl, 3 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to suitable for smoking and jerking single-layered or multi-layered sleeve food film, in particular to sausage casing for smoked and/or jerked sausage or meat products, and to method of its manufacturing. Said food film is manufactured from homogeneous melted polymer material on installation for (combined) extrusion of food film by formation with blowing by means of supply (jointly) of polymers to be extruded to nozzle of blow head and biaxial orientation in the process of triple blowing. Homogeneous polymer melt of polymers for film manufacturing represents mixture of polymers, consisting of: polyethylene terephthalate or mixture of different polyethylene terephthalates and polyvinyl alcohol, or polyethylene terephthalate or mixture of different polyethylene terephthalates and block-copolymer of polyether with amides, or polyethylene terephthalate or mixture of different polyethylene terephthalates, polyvinyl alcohol and block-copolymer of polyether with amides.

EFFECT: claimed food film provides such fey parameters as suitability for smoking, which is determined by permeability for oxygen and water vapour, as well as adsorption of oxygen and water vapour, colouring surface of filled product, rigidity and strength.

18 cl

FIELD: chemistry.

SUBSTANCE: invention relates to a biodegradable mixed aliphatic-aromatic polyester suitable for an extrusion coating, which contains links formed from at least a dicarboxylic acid and at least a diol, with long-chain branches, and substantially free from gel, characterised by shear viscosity of 800-1600 Pa*s, heat-resistance constant of less than 1.5*10-4, melt strength of 2-4.5 g and ultimate elongation greater than 30. The biodegradable polyester can be obtained by reactive extrusion from a linear polyester precursor containing links formed by dicarboxylic acid and diol and having melt flow index from 5 g/10 min to 30 g/10 min and terminal unsaturation content of 0.1-1% mol/mol. The method is realised by adding peroxides, epoxides and carbodiimides. The invention also relates to a layered article consisting of at least a base and at least a first layer consisting of the polyester disclosed herein, an extensible film, multilayer films and a composition suitable for extrusion coating, which consists of a biodegradable mixed aliphatic-aromatic ester and polylactic acid.

EFFECT: obtaining biodegradable polyesters, having physical and chemical properties which enable to obtain thin films with high melt stability and high transparency.

21 cl, 7 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a layered material coated with printing paint or printing lacquer. The printing paint or printing lacquer contains as binder at least one non-radiation cured aromatic polycarbonate based on geminally disubstituted dihydroxydiphenyl cycloalkane and as binder solvent at least one radiation cured monomer selected from a group comprising acrylates, methacrylates, vinyl ethers and nitrogen-containing compounds with an ethylene double bond. Said binder is dissolved in the solvent. After curing, the solvent remains in the printing ink or printing lacquer in a chemically cross-linked state.

EFFECT: invention provides high adhesion of the printing ink or printing lacquer to a base, prevents drying thereof on template glass during printing, the need for dilution thereof with a solvent and the undesirable washing off of paint from the print during pressure moulding.

16 cl, 11 tbl, 11 ex

FIELD: process engineering.

SUBSTANCE: method for production of plastic fuel tank 10 equipped with at least one communication element by forming the blank with the help of mould including two cavities and core. Note here that this method comprises fitting the blank in the mould and pressing it to said seats by blowing of the core and/or evacuation, final forming of the blank by blow forming and/or thermal forming. Recess 30 is formed in said blank. Aforesaid communication element is secured in said recess by soldering of at least a part of its sidewall to at least one section of lateral wall of recess 30.

EFFECT: precise and quick fitting of components.

15 cl, 20 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to composite "bag-in-container" package 2 made by blow moulding of preform 2, and to appropriate method. Said package 2 has inner layer 21 making the bag and outer layer 22 making the container, and neck communicated inner space with atmosphere. Container comprises, at least, one vent channel 3 in area of joint between inner and outer layers to communicate interlayer space with atmosphere. Note here that, at least, one vent channel 3 extends parallel with connection between aforesaid inner and outer layers to open at point 4 adjoining "bag-in-container" package and aligned with neck.

EFFECT: optimised separation of inner bag from outer container by feeding gas inino connection.

22 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to composite "bag-in-container" package made by blow moulding of preform, and to appropriate method. Said composite "bag-in-container" package made by blow moulding of preform serves to dispense fluid contained therein by squeezing it and controlling pressure between inner bag and outer container. Note here that said composite "bag-in-container" package is made from one polymer staying contact with each surface of connection between inner bag and outer container.

EFFECT: simplified production and after-use disposal.

17 cl, 2 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: composite bag-in-container package 2 is made by blow moulding from multilayer preform 1 produced by injection moulding. Said package 2 comprises inner layer 21 that makes a bad and outer layer 22 that makes a container, and filler neck 5 communicate bag inner space with atmosphere. Container comprises, at least, one vent channel 3 in area of joint between inner and outer layers to communicate interlayer space with atmosphere. Note here that bag 21 is secured relative to outer layer 22 at, at least, one point 7 located at a distance from said neck 5 and vent channel 7 in area of joint. Note here that attachment point between said inner bag and outer container is produced in blow moulding. Invention covers also the method of making above described bag-in-container. It covers also moulding tool for making said container.

EFFECT: easier lift-out of inner bag from outer container.

16 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: this invention relates, mainly, to composite two-layer performs suitable for making bag-in-container packages by blow moulding, to method of producing said performs and to bag-in-container package. Proposed preform comprises inner and outer layers. Note here that preform makes two-layer container by blow moulding. Inner layer thus made is separated from outer layer made in a similar way by feeding gas at joint between said layers. Note here that inner layer melting point exceeds or equals that of outer layer.

EFFECT: expanded performances, better quality of containers.

19 cl, 2 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to blow moulding. Proposed perform consists of inner and outer layers. Note here that said perform after blow moulding transforms into two-layer container. Note that outer layer of said container gets separated from container outer after feeding gas there between. Note also that one inner or outer layer comprises one additive to allow reaching appropriate temperature of blow moulding, in fact, simultaneously by both layers in heating in infrared furnace.

EFFECT: higher efficiency and reliability of blow moulding.

18 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: in a conventional preform the spherical form of gate part creates an alternating angle of infrared beams refraction, which results in uneven heating of the preform during repeated heating. According to the versions of the inventions realisation, a preform (300, 400, 900) is used, as well as a composite die mould (600, 1000) to make a preform (300, 400, 900). The preform (300, 400, 900) is designed for further blow molding and comprises a neck part (302, 402, 902), a gate part (306, 406, 906), and also a body part (304, 404, 904) arranged between the neck part (302, 402, 902) and the gate part (306, 406, 906). The gate part (306, 406, 906) is coupled with a substantially cone-shaped form. In a version of inventions realisation, a substantially cone-shaped form is selected so that it substantially straightens the angle of beams refraction (206), used at the stage of blow moulding process.

EFFECT: preform made in a composite die mould according to inventions, provides for straightening of refraction angle, at least a part of multiple infrared beams around the gate part at the stage of the repeated heating in process of exhaust and blow moulding.

25 cl, 11 dwg

FIELD: process engineering.

SUBSTANCE: set of invention relates to production of vessel and device to this end. Proposed method comprises sealing vessel bore and producing, at least, one bore in wall by drilling or punching. Bore completed, working medium is fed into space between outer vessel an inner vessel. Drill bit or puncher is stopped when first preset threshold pressure is reached inside inner vessel. Feed of working medium is stopped when second preset threshold pressure is reached in inner vessel. Pressure removed from space between outer and inner vessels, working medium is fed into inner vessel via vessel bore to make outer vessel, parted from vessel wall, abut it again. Proposed device comprises vessel receiver, device to insert vessel with article clamps, two drilling appliances with drill bits with channels communicated with compressed air source and device to check volume and tightness.

EFFECT: uniform controlled separation of inner vessel from outer vessel, reliable abutting between said vessels.

10 cl

FIELD: process engineering.

SUBSTANCE: multilayer bottle comprises outer and extreme inner layers made from thermoplastic polyether polymer and, at least, one barrier layer arranged between extreme outer and extreme inner layers, and filler material. In compliance with proposed method, filler material is fitted into multilayer bottle with barrier layer that satisfies particular vitrification temperature (50°C<Tg<100°C) and particular water content Wb<1 wt % measured by Carl-Fisher method at 235°C for 30 min. Produced multilayer bottle boasts no lamination between layers at impact or falling effects and may be used for hot filling.

EFFECT: no lamination between layers, nor deformation of barrier layer in hot filling.

16 cl, 5 tbl, 16 ex

FIELD: packing industry.

SUBSTANCE: bottle extruded by blow moulding that consists of thinned neck part (beak) and main body part. The main body part has the first internal layer and the second layer. The first internal layer is made of the first material selected from the group that consists of polyether, thermoplastic material of phenoxy type, phenoxy-polyolefins and their combinations. The second layer is made of the second foam material, including expanded material and carrier material. At the same time the first internal layer and the second layer are jointly extruded to form a profile. Bottle is manufactured by blowing together with extrusion of profile. Material of the second layer is represented by material from the group that includes primary PET (polyethylene terephthalate), reused PET PETG (polyethylene terephthalate modified with glycol), foam, polypropylene, polyether, polyolefins, thermoplastic material of phenoxy type, phenoxy-polyolefin thermoplastic compositions, reused ground rejected materials (wastes) and their combinations. The second material differs from the first internal material. Method for bottle manufacturing consists in joint extrusion of profile having the first internal layer and the second layer. Layers are manufactured accordingly to bottle layers. Version of bottle manufacturing consists in the fact that the second layer is installed outside the first internal layer and has the third layer made of pre-ground sectional material produced by grinding of residual material from extrusion process. At the same time the third layer is arranged outside the first inner layer and inside the second layer. Method of such bottle production includes operations of residual material grinding from extrusion process and joint extrusion of profile from three layers. Then profile is blown to produce a bottle. Extrusion profile for storage of drinks comprises the first extruded internal layer that comprises material selected from group that consists of thermoplastic material of phenoxy type, mixture of thermoplastics pnenoxy polyolefins and their combinations and the second layer. The second layer is selected on the basis of above specified polymers and sectional materials. It is desirable to eliminate unfavorable influence at the content in process of long-term storage of food or drinks in container.

EFFECT: efficient thermal barrier for reduction of heat exchange via container or package.

10 cl, 56 dwg

FIELD: chemical industry; methods and devices for production of products out of polyether.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the methods and devices for production of products out of polyether, preferably - out of pure polyethylene terephthalate material having one or more directly coated surfaces made out of one or more layers of the reprocessed or used polyethylene terephthalate material and one or more layers of the material with good barrier characteristics to gas, from preferably silicon dioxide. The blank contains a threaded neck end made out of one layer of the pure polyether, a carcass part containing an end cover, a carcass part containing the first and the second layers. At that the second layer consists preferentially from a reprocessed polyethylene terephthalate material layer, which makes about 25-50 % of the general content of the material. The method of manufacture of a blank includes the following steps: injecting of a polyether hot melt into the cavity formed by a casting mould and the core. At that the casting mould has a threaded neck end part - at the first temperature and the carcass part - at the second temperature. The first temperature is higher, than the point of the polyether crystallization, and the second temperature is below the crystallization point of the polyether. Then they leave the polyether hot melt in a contact with a casting mould and the core for forming blanks. The carcass part is initially amorphous or hypocrystalline and the threaded neck end is initially crystalline. Extract the blank from the first casting mould and position it in the second casting mould. At that the second casting mould contains a threaded neck end part - at the first temperature and the carcass part - at the third temperature. Conduct injection of the polyethylene terephthalate material hot melt atop of the carcass part to form a double-layer blank and its extraction from the casting mould. The laminate contains a layer of the pure polyethylene terephthalate material, a layer of reprocessed polyethylene terephthalate material, and a barrier layer for a gas. The layer of the pure polyethylene terephthalate material is directly stuck to the layer of reprocessed or used polyethylene terephthalate material, and the reprocessed layer contains approximately 25-50 % of the laminate material. It is preferential, that the products have the forms of the blanks and the containers molded from them by an injection and coated at least with one layer of a barrier material. The blank contains a threaded neck end, the neck cylinder and a carcass part. At that the carcass part in addition contains an end cover, the threaded neck end, the neck cylinder, The carcass part contains the first layer made out of the pure polyether, and the carcass part in addition contains the second layer, that makes compounds about 25-50 % of the blank. At that the first and the second layers are formed by injection molding. The casting mould for making the blank includes the first and the second casting molds and the core. At that the first casting mould contains a threaded neck end part with the first system of control of the casting mould temperature and the carcass part with the second system of the temperature control, and the core having the third system of the temperature control. At that the first system of the temperature control is independent from the second and third control systems of temperatures. The threaded part is heat-insulated from the carcass part and the core. The preferential barrier materials have more low permeability for oxygen and carbon dioxides, than polyethylene terephthalate material. In addition the neck of the blanks and bottles is at least in a crystalline state, and the carcass is initially amorphous or hypocrystalline. Such structure of the blanks allows the blanks to be molded easily by injection due to the amorphous material in the carcass, at keeping the capacity to have a dimensional stability in cases of the hot filling applications. The technical result of the inventions is manufacturing of the products made with the appreciable mass percent share out of the reprocessed polyethylene terephthalate material and with a coating of surfaces of one or more layers made out of the material approved for contacts with the foodstuff and having the good characteristics of the barrier against gases.

EFFECT: the inventions ensures manufacture products made with the appreciable mass percent share out of the reprocessed polyethylene terephthalate material and having the coatings of the one or more layers surfaces made out of the material approved for contacts with the foodstuff and with the good characteristics of the barrier against gases.

39 cl, 19 dwg

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