47results about How to "Excellent oxygen barrier" patented technology

Provided are: a novel oxygen-absorbing resin composition which is not sensitive to metal detectors, does not generate an odor after the absorption of oxygen and exhibits excellent oxygen absorption performance; an oxygen-absorbing molded body which uses this oxygen-absorbing resin composition; and a multilayer body, a container, an injection molded body, a medical container and the like, each of which uses the oxygen-absorbing resin composition or the oxygen-absorbing molded body. Also provided are: an oxygen-absorbing resin composition which exhibits excellent oxygen absorption performance over a wide range of humidity conditions from low humidity to high humidity; and the like. An oxygen-absorbing resin composition of the present invention contains a polyester compound and a transition metal catalyst, and the polyester compound contains at least one constituent unit that has a tetralin ring. An oxygen-absorbing molded body of the present invention is obtained by molding the oxygen-absorbing resin composition into a film form or a sheet form. A multilayer body, container, injection molded body, medical container and the like of the present invention are obtained using the oxygen-absorbing resin composition of the present invention.

The invention relates to a modified hydrolysis-resistant polyvinyl alcohol high polymer material, a production method and application, which belongs to the field of high polymer materials. The modified hydrolysis-resistant polyvinyl alcohol high polymer material is composed of the following components: by weight parts, 8 to 12 parts of polyvinyl alcohol with the polymerization degree ranging from1500 to 2000 and alcoholysis degree larger than or equal to 99%, 65 to 75 parts of purified water, 5 to 7 parts of sec-butyl alcohol or methyl alcohol, 0.2 to 0.25 part of organic titanate, 0.5 to 3 parts of glycerol, 0.08 to 0.15 part of lauryl sodium sulfate, 2 to 4 parts of alkoxy silane and 2 to 5 parts of melamine resin. Rubber preparation and coating at normal temperature are realized, solution is transparent, and coatings of the modified hydrolysis-resistant polyvinyl alcohol high polymer material have excellent printing and compositing adaptation performance and can meet the requirements of composite of various material structures.

The invention provides a preparation method of a carbon molecular sieve, which comprises the following steps: by using agricultural waste nutshell, chestnut shell and a polyvinyl chloride resin as raw materials, preparing raw material powder, forming, carbonizing, and carrying out carbon deposition and the like. Especially in the carbon deposition process, a supercritical carbon dioxide reaction kettle is adopted, so that the reaction can be performed uniformly and thoroughly. The obtained carbon molecular sieve has fine and uniform pores; the produced nitrogen concentration reaches 99.6 vol% (the N2 flow rate is 40 ml / minute during testing); the strength of the carbon molecular sieve determined by the rotating drum reaches 99.9%; the properties of the product are greatly enhanced; and the overall reaction process is combined, thereby saving the energy by 40%.

The invention provides a seven-layer co-extrusion transparent high-isolation film and a preparation method thereof. The invention provides a transparent high-isolation film, which comprises a first polyamide layer, a first linear low density polyethylene layer, a second polyamide layer, an ethylene-vinyl copolymer layer, a third polyamide layer, a second linear low density polyethylene layer and a polyethylene layer which are sequentially contacted with one another. According to the transparent high-isolation film, the ethylene-vinyl copolymer has excellent oxygen resistance performance, and can prevent the oxygen from permeating; the polyethylene has excellent moisture resistance performance, and can prevent vapor from permeating; the polyethylene also has excellent low-temperature and heat-sealing performance, and can be used as an inner layer of the transparent high-isolation film; the polyamide has high mechanical strength, has excellent compatibility with the ethylene-vinyl copolymer, and can be used as a support protection layer of the ethylene-vinyl copolymer layer; and the polyamide has excellent printing performance and wear-resisting property, and can be used as an outer layer of the transparent high-isolation film.

The invention discloses a production method of a stretch-resistant high-barrier polypropylene film, which uses isophorone diisocyanate as a coupling agent to couple hydroxyl-terminated isotactic polypropylene with polyethylene glycol monomethyl ether to prepare Isotactic polypropylene-b-polyethylene glycol diblock, the synthesis technology method is easy to implement, with low cost and high efficiency, the raw materials used are simple and easy to get, and the price is low. Polyethylene glycol diblock is used as a compatibilizer for isotactic polypropylene and polyvinyl alcohol, polyvinyl alcohol has excellent oxygen barrier properties, and isotactic polypropylene‑b‑polyethylene glycol diblock is used as a compatibilizer After pretreatment, the good compatibility between polypropylene and polyvinyl alcohol makes the polyvinyl alcohol phase uniformly dispersed in the polypropylene resin to form a sub-continuous phase or a lamellar structure, thereby significantly improving the blend film. Excellent barrier properties; clay and ceramic whiskers are blended with polypropylene copolymer to effectively improve the tensile strength of the film.