Environmentally safe packing material based on polylactide

FIELD: packaging industry.

SUBSTANCE: packing material based on polylactide is created by mixing polylactide with dispersed filler SiO2 (aerosil) with a concentration of 1.9-2.1% by volume and a particle size of 12 nm. Mixing was carried out for 5 minutes at a temperature of 180°C. Further, the finished composition was placed in a hot press at a pressing temperature of 180°C and a pressing pressure of 15 MPa. The films were cooled for 1 min, then placed in a positive corona discharge field, charged at room temperature or at a temperature above the polylactide glass transition temperature for 5 min to a surface potential of 1.3-1.5 kV.

EFFECT: production of active packaging on the basis of biodegradable materials with increased electret effect.

4 dwg, 2 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of production of polymer fibres, in particular, polypropylene fibres, which can be applied as a reinforcing for cement, gypsum, concrete, etc. The fibre is obtained by moulding from a melt and further processing by ionising radiation. The fibre is 0.1-40 mm long, has a diameter of 5-170 mcm and the melt flow index higher than 500 g/10 min, measured in accordance with DIN EN ISO 1133.

EFFECT: application of the obtained fibres provides an increase of fire resistance of the concrete products.

5 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry of polymers and deals with a method of obtaining hardly flammable polymer products based on polyethyleneterephthalate with biocidal properties, which can be applied in the textile industry, medicine, in products of a special purpose as well as in other fields of industry. The method of obtaining hardly flammable polymer products based on polyethyleneterephthalate with biocidal properties includes stretch forming of polyethyleneterephthalate-based polymer product in an adsorption-active liquid medium, containing modifying additives, and the product drying, with, at least, one modifying additive being a biocidal preparation and, at least, one modifying additive being a fire retardant, and one of the modifying additives is pentaerythritol.

EFFECT: reduction of the polymer material dropping with preservation of lower combustibility and biocidal activity.

8 cl

FIELD: chemistry.

SUBSTANCE: composition contains low-molecular siloxane caoutchouc, ethylsilicate-40, octaphenyltetraasaporphyrinatocobalt(II) or octaphenyltetrapyrazinoporphyrazinatocobalt(II).

EFFECT: increase of covering stability to abrasion and its water-resistance.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: method comprises treatment of cloth at room temperature with a composition comprising, g/l: polyhexamethylene guanidine hydrochloride 15-25, copper acetate or zinc acetate 4-7, acetic acid 4-7, and water up to 1 liter and then the cloth is heat-treated at a temperature of 130-180°C for 1-10 minutes, while half-woollen cloth is made by interlacing of warp and weft yarns of wool and polyester fibers with filling ratio of cloth in the warp and weft equal to 0.9-1.3.

EFFECT: giving the fabric antiallergenic and bacteriostatic properties, while maintaining the antimicrobial activity after wet treatments.

1 dwg

FIELD: textiles, paper.

SUBSTANCE: composition contains the agent which represents diethylene-glycol ester 1,3-dimethyl-4,5-dihydroxyethyleneurea - 15-30 g/l, magnesium chloride - 1-3 g/l, the agent representing styrene-vinyl-acetate-acrylic copolymer - 30-75 g/l and water - up to 1 litre.

EFFECT: reduced loss of strength and domestic shrinkage of processed material, maintaining soft handle, simultaneous infusion of properties of low crease retention and resistance to shrinkage, increase in reliability of the equipment operation due to the absence of adhesion, reduction of energy consumption during treatment of the material.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: method of metallisation woven materials lies in melting of metal wires with electric influence, as well as in spraying of microparticles of molten metal to the plane of the material moving orthogonally to the direction of the spraying with the given speed of feeding and protected with the medium of spray distribution from the damaging effect of high temperatures. The explosive melting of the wire substance is carried out through high-voltage electric influence between the ends of the non-open wire delivered discretely to the metalliser in aqueous medium, and a cloud of ionised particles of evaporated metal is formed, and metallisation is performed by energy cumulation of thermal explosion W and electromagnetic focusing of motion trajectories of the ionised particles to the target rate of metallisation, and the rate of feeding Fn of the process material is regulated in time with a spacing frequency nsp of electric influence, and the volume Vw of the exploded wire is changed, as well as the spraying propagation medium, the voltage Uco and the spacing frequency nsp of electric influence formed by a bit relaxation circuit Lc-Ct, and the metallisation indices are set and controlled during metallisation according to the value of the scattering coefficient Ks of electromagnetic radiation, characterised by the formula: where: Uco is a voltage of electric influence exploding the wire; εm"ш" is dielectric capacitance of the fabric material and metal particles, respectively; α is lateral dimensions of the particles; W is energy released under electric explosion of the wire, of the given volume Vw; Zac is acoustic impedance of the discharge circuit forming the spacing frequency nsp of electric influence; ρmwf,λvap is density, specific electrical conductivity, heat of fusion and heat of vaporisation of the wire material in a given environment; Lc is the circuit inductance; Ct is capacity of tank of capacitors; T=tspTs⇔VwKl emf is the number of explosions of the wire in processing of area of fabric with volume Vfab necessary to ensure the given index of metallisation with guaranteed by experimentally proved dependence of metal amount introduced into the fabric on the volume of the exploded wire Vw taking into accountfor adjustment for the loss coefficient Kl emf at electromagnetic focusing of motion trajectories of the ionized particles; Ts is the sampling period of time of feeding the section of plane of metallised surface; d is thickness of the fabric; λ is wavelength of the electromagnetic radiation in a vacuum; and the value of the metallisation index Kp is set and controlled using a physical phenomenon of scattering of electromagnetic waves in the infrared range, and the voltage of electric influence Uco exploding wire with length of 40 mm and a diameter of 0.6 to 1 mm is adjusted from 2 to 4 kV with values of capacity of tank of capacitors Ct of 150 to 200 microfarad and values of the discharge circuit inductance Lc of 30 to 40 mcH, ensuring minimum loss of metal from 30% to 40% with an electromagnetic focusing of motion trajectories of the ionised particles.

EFFECT: technology is feasible in any media, including, liquids, the cloths have shielding properties, and antibacterial, antiviral, catalytic activity.

1 cl, 6 tbl, 6 dwg

FIELD: textiles, paper.

SUBSTANCE: bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin.

EFFECT: enhanced biodegradability, to textile sheets such as nonwoven materials comprising these fibers, which can be used in personal care products.

16 cl, 3 tbl, 2 ex

FIELD: textiles, paper.

SUBSTANCE: bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin.

EFFECT: enhanced biodegradability, to textile sheets such as nonwoven materials comprising these fibers, which can be used in personal care products.

16 cl, 3 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: liquid low-molecular siloxane rubber-based composition for fire-resistant material also contains ethyl silicate-40 or tetraethoxy silane as a curing agent and a titanium-containing compound in form of alkoxytitanium borate, where the alkoxy groups are ethoxy, propoxy or butoxy groups.

EFFECT: composition having high stability and adhesion to synthetic fabrics, which increases fire-resistance and reduces hardness of material with a coating made from said composition.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing anti-contamination composite materials. The material contains a polymer fibre substrate on whose surface there is a layer of fine inorganic particles and a binding component formed via chemical bonding. Each of said fine inorganic particles is coated with a silane monomer with unsaturated bonds. Content of said binding component ranges from 0.1 wt % to 40 wt % of the amount of fine inorganic particles. The material can be in form of a fabric, filter, mosquito net, construction material and material for inside rooms.

EFFECT: material is dustproof and highly durable.

13 cl, 10 dwg, 7 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: non-woven polymer nanofibrous material is obtained from a moulding solution based on polyhydroxybutyrate, the composition of which contains nanocrystalline silicon in a quantity of 0.1-1.5 wt %, and a technological additive, which represents salt of tetrabutylammonium iodide, dissolved in a mixture of chloroform and formic acid in the concentration of 1 g/l.

EFFECT: obtained polymeric non-woven composite material has an increased strength and resistance to UV-radiation.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to biodegradable polymer composition, which includes polylactic acid, polyglycolic acid and accelerator of ester decomposition from inorganic disperse substance, which accelerates hydrolysis of said polyglycol.

EFFECT: invention ensures fast destruction of biodegradable polymer composition.

4 cl, 1 tbl, 8 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer-based composition which contains a polyester and a cyclic carbodiimide. Disclosed is a polymer-based composition for moulded articles, which contains a polyester (component A), the terminal group of which is modified, and a compound which includes a cyclic structure with only one carbodiimide group, the first and second nitrogen atoms of which are bound together by a binding group in the cyclic structure (component B). The invention also discloses a method of producing said composition and an article moulded therefrom.

EFFECT: disclosed composition has no odour caused by free isocyanate.

26 cl, 1 tbl, 11 ex

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: present invention relates to a composition for moulding articles and a method of producing said composition. The composition contains 100 pts.wt of a polymer component A, which consists of 5-100 wt % of a lactic acid polymer (component A-α) and 95-0 wt % of thermoplastic resin (component A-β), 0.001-5 of pts.wt of a phosphoric-fatty acid ester (component B), 0.01-5 pts.wt of metal phosphate salt (component C), 0.001-2 pts.wt of at least one antioxidant (component D), 0.001-10 pts.wt of a chain end closing agent (component E) and 0.01-0.3 pts.wt of hydrotalcite. The antioxidant is selected from a group comprising a phosphite-based compound, phosphonite-based compounds, a hindered phenol-based compound and a thioether-based compound. The method of producing the composition involves mixing, at 250-300°C, composition-1, which contains poly-1-lactic acid and a phosphoric-fatty acid ester, and composition-2, which contains poly-d-lactic acid and a phosphoric-fatty acid ester, in the presence of a metal phosphate salt to obtain a stereo-complex lactic acid polymer. Further, component A, which consists of the obtained stereo-complex polymer and a thermoplastic resin, is mixed with the antioxidant and the chain end closing agent.

EFFECT: obtained composition has good thermal stability, especially in humid conditions.

14 cl, 22 tbl, 70 ex

FIELD: chemistry.

SUBSTANCE: composition contains 1-20 wt % polylactic acid with molecular weight of 50000-110000 and polyethylene terephthalate. The composition is characterised by axial Young's modulus of 1.4 Pa and radial Young's modulus of 2.8 Pa, as well as characteristic viscosity greater than 0.5 dl/g. The method of making a packaging product involves preparing a polymer mixture from polylactic acid and polyethylene terephthalate, mixing thereof, heating, extrusion and blow moulding.

EFFECT: compositions have improved properties, including high strength, flexibility, relative elongation, temperature stability, processability, air permeability and the capacity to form a dead fold.

23 cl, 9 tbl, 4 dwg, 2 ex

FIELD: physics.

SUBSTANCE: composition contains 68-82 wt % polyolefin, 8-32 wt % polyhydroxybutyrate and 5-10 wt % ketone (co)polymer.

EFFECT: composition has sufficient processability, is not toxic for the body, is environmentally safe and is highly biodegradable in ambient conditions.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: material contains a polymer matrix - polyhydroxybutyrate and filler. The matrix also contains glycerine as a plasticiser and the filler is a surfactant-modified sheet silicate, with the following ratio of components in wt %: sheet silicate 1-5, glycerine 1.3-5 and polyhydroxybutyrate - the rest. Content of the plasticiser in the matrix is not over 5 wt %. The sheet silicate is Na+ - montmorillonite grade clay.

EFFECT: invention enables to obtain biodegradable material using a simple method with high modulus of elasticity, strength and deformability.

2 cl, 2 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: solid resin based on vinylacetate copolymers are obtained through copolymerisation of vinylacetate and one or more ethylene unsaturated monobasic carboxylic acids from a group comprising acrylic, methacrylic and crotonic acid. Copolymerisation is carried out in the presence of one or more mercaptoalkylcarboxylic acids with 2-6-hydrogen atoms. The obtained solid resin based on vinylacetate along with functional carboxyl links also contains terminal carboxyl groups. The solid resin based on vinylacetate copolymers as an additive reduces shrinkage of the polyester resin during solidification, removes internal stress in the resin, minimises formation of microcracks and makes easier adherence to production tolerance.

EFFECT: reduced shrinkage of unsaturated polyester resin.

6 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: proposed is a method of drying or concentrating polymers capable of being biologically destroyed from polyhydroxyalkanoate, polycaprolactone, polymeric lactic acid, poly-glycolic acid, poly-(lacto-glycolic) acid, polymeric succinic acid, or their mixtures, or their copolymers. Polymer contained in solution or biomass, is subjected to microwave radiation for a period of time, sufficient for decreasing the concentration of polar solvent in the above mentioned solution or biomass respectively to 0.0001%-100%. The specified action causes destruction to the polymer from 0 to 25%.

EFFECT: drying of biopolymers without their destruction.

7 cl, 13 dwg, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an elastomeric composition with a biodegradability degree below 50%, preferably below 30%, which comprises at least 0.5% and at most 99.95 wt % acetate of a starchy material, having a degree of substitution (DS) between 2.5 and 3 and, at least, 0.05 wt % and at most 99.5 wt % of a polymer other than starch, where the polymer is selected from a group comprising natural rubber and its derivatives, polyisobutylenes, polyisoprenes, styrene-butadiene copolymers (SBR), butadiene-acrylonitrile copolymers, hydrogenated butadiene-acrylonitrile copolymers, acrylonitrile-styrene-acrylate copolymers (ASA), ethylene-methyl acrylate copolymers (EAM), thermoplastic polyurethanes (TPU) in the form of simple ethers or in the form of a compound ether-simple ether, polyethylene or polypropylene, functionalised with halogenated silane, units of acrylic or maleic anhydride, ethylene-diene monomer rubber (EDM) and ethylene-propylene-diene monomer rubber (EPDM), thermoplastic elastomers, derived from polyolefines (TPO), styrene-butylene-styrene copolymers (SBS) and styrene-ethylene-butylene-styrene copolymers (SEBS), functionalised with units of maleic anhydride, and other blends of the above polymers. The composition may be used as a masterbatch or a matrix of the masterbatch, a plastic raw material, a compound for plastic or elastomeric articles, an adhesive, especially of a hot-melt type, or a matrix for the formulation of an adhesive, in particular of a hot-melt type, as a gum base or a matrix of the gum base, in particular for chewing gum, resin, co-resin or nanofiller for rubber, elastomers, bitumens, printing ink, varnish, paint, paper and cardboard, woven and non-woven products or thermosetting resins. It may also be used for the production of parts of equipment for the transport industry, in particular the automotive, aeronautical, railroad or ship building industry, for the electrical appliance, electronic appliance or electrical household appliance industries or for the sports and leisure industry.

EFFECT: compositions with low or very low biodegradability, long term high stability in water.

20 cl, 3 tbl

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