Kolon Industries, Inc.

So-Yeon Kwon

In-Sik Han

Jae-Young Lee

Young-Han Jeong

Seung-Hwan Lee

Jae-Young Kim

Hyun Namgoong

Il Kyung Chung

Ok-Hwa Jeon

Chang-Bae Lee

Tae-Hak Park

Seong-Hun Kim

Gi-Woong Kim

Young-Se Oh

Woo-Chul Kim

Jae-Woong Lee

Jong-Cheol Jeong

Seung-Hwan 205-403 Magwang Apt Lee

Jae-Young c/o Kolon Central Research Park Lee

There is provided a polymer film which includes: a base film layer including a polyamide-based resin having a particular relative viscosity and a copolymer including a polyamide-based segment and a polyether-based segment having a specific content; and an adhesive layer formed on at least one side of the base film layer, wherein a ratio of the melt viscosity of the copolymer to the melt viscosity of the polyamide resin is 0.65 to 1.2 at a shear rate of 1000 sand a temperature of 260&#xb0; C.

Polymer films

There is provided a polymer film which includes a base film layer having an absolute weight average molecular weight of 50,000 to 1,000,000 and an adhesive layer, and a method for manufacturing the polymer film. This film for a tire inner liner can endow an excellent gas barrier property even to tires having a relatively thin thickness so that weight of the tire can be reduced and fuel efficiency of automobiles can be improved. Further, the present film facilitates molding in a tire manufacturing process, and exhibits excellent adhesion force to a carcass layer while having excellent mechanical properties such as high durability and fatigue resistance together with excellent moldability.

The present invention relates to a film for a tire inner liner including a base film layer including a copolymer or a mixture of a polyamide-based resin and a polyether-based resin, and an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive, and having low shrinkage rate when elongated at a high temperature and then cooled to room temperature, and a method for manufacturing the same.

Film for tire inner liner, and method for manufacturing the same

This disclosure relates to a film for a tire inner liner including a base film layer that has 3 glass transition temperature peaks and an adhesive layer including a resorcinol-formalin-latex(RFL)-based adhesive, and a method for manufacturing the film for a tire inner liner.

Film for tire inner liner and method for manufacturing the same

Disclosed is a film for a tire inner liner including a base film layer having an absolute weight-average molecular weight of 50,000 to 1,000,000, and an adhesive layer, and a method for manufacturing the film for a tire inner liner. The film for a tire inner liner may exhibit excellent gas barrier properties while having a thin thickness and lighter weight, and thus improves fuel efficiency, allows easier construction during its preparation, has excellent mechanical properties including high durability and fatigue resistance, and provides excellent adhesive strength to a tire carcass layer.

Film for a tire inner liner and preparation method therefor

Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized by comprising multi-stage injection of a coagulant with sulfuric acid concentration lowered sequentially stage by stage, to a spun material fed into a coagulant injection tank. The present invention enables increase of a spinning and take-up velocity without occurrence of thread cutting by uniformly and evenly coagulating surface and inside of the spun material. In addition, the present invention recovers the coagulant or water already used and reuses the recovered coagulant or water in the earlier stages, so that it has advantages of saving production costs and reducing environmental contamination. Accordingly, the wholly aromatic polyamide filament produced according to the present invention has high crystallinity X, large apparent crystal size ACS and reduced defects in the crystal itself, thereby exhibiting more improved physical properties such as strength and modulus.

Process of making wholly aromatic polyamide filament

The present invention provides cellulose-based fibers including cellulose and at least one polymer selected from the group consisting of a polysiloxane, a polyacrylic acid, a polyacrylamide, an m-aramid, and a polyvinylalcohol/polystyrene copolymer, and a tire cord including the same. Furthermore, the cellulose-based fibers of the present invention have an advantage in superior elongation and tenacity of the prior cellulose fibers by blending at least one polymer having a functional group that is capable of a hydrogen bond with a hydroxyl group of a cellulose molecule.

Cellulose-based fiber, and tire cord comprising the same

Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized in that, in the process of preparing the wholly aromatic polyamide polymer, the aromatic diamine, aromatic diacid chloride and polymerization solvent put into the reactorare agitated by an agitation device which is installed in the reactorand consists of: (i) a rotordriven by a motorand having a plurality of pins; and (ii) a statorhaving a plurality of pins, wherein spin speed of the rotoris controlled to 10 to 100 times of both of feeding rates for the aromatic diacid chloride and the aromatic diamine in the polymerization solvent into the reactor and, at the same time, contact frequency between the pinsand the pinsis regulated within a range of 100 to 1,000 Hz. The present invention is effective to progress uniform and homogeneous polymerization over all of area of a polymerization reactor, thereby reducing deviation in degree of polymerization, since polymeric monomers are miscible and react together very well in the reactor. Accordingly, the wholly aromatic polyamide filament produced exhibits narrow PDI and lowered paracrystalline parameter gleading to reduction of defects of a crystal itself, so as to considerably improve strength and modulus thereof.

Process of making aromatic polyamide filament

Disclosed are a method of manufacturing wholly aromatic polyamid filaments and wholly aromatic polyamid filaments produced by the same. The process includes control of a timing for introducing wholly aromatic polyamid polymer into an extruder for preparation of a spinning dope based on particle size and/or inherent viscosity (IV) of the polyamid polymer.

Method of manufacturing aramid filament

Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized in that, in a process of preparing wholly aromatic polyamide polymer, a multiple tubular feed pipe for polymeric monomer and polymerization solvent with specific construction of adjacent inner pathsand outer pathswhich are alternately arranged one another is used to feed either aromatic diacid chloride A or aromatic diamine dissolved in the polymerization solvent B into a polymerization reactorthrough corresponding one among the inner and outer pathsand. The present invention is effective to progress uniform and homogeneous polymerization over all of area of a polymerization reactorleading to reduction of deviation in degree of polymerization, since polymeric monomers are miscible and react together very well immediately after putting the monomers into the reactor. Accordingly, the wholly aromatic polyamide filament produced exhibits narrow PDI and increased ACS, so as to considerably improve strength and modulus thereof.

Growing community of inventors

Busan, South Korea

So-Yeon Kwon