Sk Innovation Co., Ltd.

Korea Atomic Energy Research Institute

Korea Hydro Nuclear Power Co., Ltd.

Sk Ie Technology Co., Ltd.

Hyundai Motor Company

Other

Kia Corporation

Kia Motors Corporation

Coway Co., Ltd

Sk Global Chemical Co., Ltd.

Sk Geo Centric Co., Ltd.

Kolon Glotech, Inc.

Kolon Spaceworks Co., Ltd.

Pusan Nat. Uni. Industry-University Coop.fdn.

Korea Electric Power Corporation

Sang Yoon Park

Hyeon Jeong Kim

Tae Sug Jang

Myung Ho Lee

Jin Hyung Park

Hyun Gil Kim

Yong Hwan Jeong

Jong Hyuk Baek

Byoung Kwon Choi

Chi Hoon Choi

Dong Jun Park

Jeong-Yong Park

Byoung-Kwon Choi

Yang-Il Jung

Cheol Nam

Youn Ho Jung

Yang-Hyun Koo

Jeikwon Moon

Chong-Hun Jung

Hui-Jun Won

In-Ho Yoon

Wangkyu Choi

Hyun Sik Kim

Yong Beom Lee

Hee Seouk Chung

Sang Sun Park

Hye Ri Kim

Kyeong Ho Kim

Seong Jong Kim

Sang Jae Yoon

Jeong Yong Park

Dong Won Kim

Jun Young Kim

Jeong Hoon Kim

Dong Jun Lee

Min Soo Kim

Jeong Min Cho

Joo Hyun Lee

Min Sang Park

Hyo Shin Kwak

Deok Hwa Hong

Byeong Cheon Lee

So Young Lee

Jong Nam Ahn

Hyo Sung Kim

Sung Chul Cha

Seung Chan Lee

Young Gyu Kim

Sung Su Yoo

Jin Su Park

Seung Hyun Hong

Hee Sam Kang

Byoung Sun Ko

Jun Hyoung Kim

Jin Won Park

Keon Hyeok Ko

Chan Jung Park

Ho Chul Yoon

Bum Kyoung Seo

Man Soo Choi

Jeong Wan Han

Jun Hwan Kim

Se Rah Moon

Jun Youp Kim

Younho Jung

Il Hyun Kim

Jei Kwon Moon

June Ho Yang

Seung Uk Kang

Ji Sang Jeong

Byung-Seon Choi

Sang Won Lim

Wang Kyu Choi

Hyun Kyu Shin

Hee Chul Eun

Jong Dae Lim

Byung Seon Choi

Hui Jun Won

Pil Won Kang

Jun-Young Jung

Kum Soo Bae

Jung-Sun Park

Yeun Ho Yu

Hyeon Seok Do

Cheol Min Nam

Chong Hun Jung

Seon Byeong Kim

Na On Chang

Sang Hun Lee

Seonbyeong Kim

Mansoo Choi

Jun Young Jung

Jungsoon Park

Song Bok Lee

Myong Ho Lee

Provided a diamine compound, a polyimide precursor and a polyimide film using the same, and a use thereof. The diamine compound may be very useful as a monomer for manufacturing a polyimide film having excellent transparency, high heat resistance, and low retardation.

Diamine compound, polyimide precursor and polyimide film using the same, and use thereof

Provided is a polyamideimide film which has an excellent uniformity of a birefringence value and may provide excellent display quality.

Polyamideimide film

A lower cross member for a vehicle is disposed on a floor of a vehicle. The lower cross member includes a core member and a reinforcing layer. The core member is made of a composite material containing 70 wt. % or more of unidirectional carbon fibers, and the reinforcing layer is made of a composite material containing 70 wt. % or more of fiberglass.

Lower cross member for vehicle

Provided are a polyamic acid resin derived from an aromatic diamine, an aromatic dianhydride, a cycloaliphatic dianhydride and an aromatic diacid dichloride, and a polyamideimide film including polyamideimide derived from an aromatic diamine, an aromatic dianhydride, a cycloaliphatic dianhydride and an aromatic diacid dichloride.

Polyamic acid resin and polyamideimide film

Provided are a polyamideimide film, a window cover film, and a display panel including the same. More specifically, a polyamideimide film including an amideimide structure derived from a dianhydride, a diamine, and an aromatic diacid dichloride is provided, wherein a chlorine content in the film is 5 to 33 ppm and a yellow index change amount ΔYI is 5 or less, the yellow index change amount being measured in accordance with ASTM E313 after repeating a process of irradiating 0.55 W/mof UVA at 340 nm at 40° C. for 20 hours and then blocking UVA for 4 hours three times.

Polyamideimide film and flexible display panel including the same

Disclosed is a lower cross member of a vehicle. The lower cross member includes a core member configured to be disposed on a vehicle floor so as to extend in a width direction of the vehicle, to be formed of a composite material including unidirectional carbon fiber or bidirectional carbon fiber, and to have a cross-section including at least one closed curve, a lower layer configured to extend in an extending direction of the core member, to be disposed between the core member and the vehicle floor, and to be formed of a composite material including a first multi-axial glass fabric, and an upper layer configured to extend in the extending direction of the core member, to be disposed on an upper surface of the core member, and to be formed of a composite material including a second multi-axial glass fabric.

Lower cross member of vehicle

The present disclosure relates to an apparatus and a method for an impact test, which can easily accelerate an impact body at a desired acceleration using an air pressure and an electromagnetic force. According to an embodiment of the present disclosure, an apparatus for an impact test includes a clamping unit configured to fix a specimen, and an impact unit disposed to be spaced apart from the clamping unit and configured to accelerate and launch an impact body to collide with the specimen by an air pressure and an electromagnetic force.

Apparatus and method for impact test

The present invention relates to a polyimide-based film, a window cover film, and a display panel including the same. More specifically, the present invention relates to a polyimide-based film having a difference (&#x394;I) between the maximum and minimum values of intensity in a thickness direction of 0.6 or less, when an aromatic ring peak of 1610 to 1630 cmwas measured by Raman spectroscopy in which an excitation wavelength is 532 nm, a laser spot is 1 to 2 &#x3bc;m, and a thickness direction measurement interval is 1 &#x3bc;m.

Polyimide film and flexible display panel including the same

The present disclosure provides a solidifying method of a radionuclide. The solidifying method of the radionuclide includes operations of: providing a low melting point glass including BiO, BO, ZnO and SiO; providing a glass mixture mixing a mixture to be treated containing a hydroxide of radionuclide and BaSOand the low melting point glass; and heating the glass mixture.

Solidifying method of hydroxides of radionuclides

A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.

Chemical decontamination method using chelate free chemical decontamination reagent for removal of the dense radioactive oxide layer on the metal surface

Provided is a hard coating film including a polyamideimide substrate layer and a hard coating layer, each of which has a predetermined refractive index, with a difference in the refractive index between those layers being 0.05. The substrate layer has a tensile modulus of 3 to 7 GPa, at a thickness of 80 &#x3bc;m, as measured according to ASTM D111. The present invention relates to a hard coating film having improved mechanical and optical properties.

Hard coating film and preparation method thereof

A decontamination method that includes the steps of decontaminating an object containing radioactive contaminated metals or alloys with a chemical decontamination agent including sulfuric acid (HSO) and forming a Ba or Sr precipitate by adding a Ba or Sr cation and a hydroxylion or halogen anion salts to the decontamination waste water.

Decontamination method reducing radioactive waste

A hybrid propeller shaft may include a CFRP tube layer in which high-strength CFRP or high-elasticity CFRP, the high-strength CFRP, and the high-elasticity CFRP are laminated to form at least two layers while having different wrapping angles by a prepreg wrapping process method; and a protective layer which is formed on an outermost layer of the CFRP tube layer to protect the CFRP tube layer.

Hybrid propeller shaft for vehicle

Disclosed herein is a method of treating a composite piston pin, including: preparing the piston pin of which at least surface layer includes a composite material including a reinforcing fiber and a resin; improving roughness by processing the surface layer of the piston pin; and forming a coating layer on the surface layer processed to reduce a friction coefficient of the piston pin.

Method of treating composite piston pin and surface treated composite piston pin

Growing community of inventors

Daejeon, South Korea

Sang Yoon Park