公开(公告)号：US20240359438A1

公开(公告)日：2024-10-31

申请号：US18683249

申请日：2022-09-01

申请人： SK MICROWORKS CO., LTD.

发明人： Seokin LEE ,  Kweon Hyung HAN

IPC分类号： B32B27/08 ,  B32B7/027 ,  B32B27/36 ,  B32B37/15 ,  B32B38/00

CPC分类号： B32B27/08 ,  B32B7/027 ,  B32B27/36 ,  B32B37/153 ,  B32B38/0004 ,  B32B38/0012 ,  B32B38/0036 ,  B32B2038/0028 ,  B32B2250/05 ,  B32B2250/244 ,  B32B2250/42 ,  B32B2307/518 ,  B32B2307/7163 ,  B32B2307/7376 ,  B32B2367/00

摘要： The present invention provides a multilayered biodegradable film, a method for manufacturing same, and an eco-friendly packaging material comprising same. Specifically, the multilayered biodegradable film comprises two or more kinds of different thermoplastic resin layers, which are alternately laminated and include: a first resin layer containing as a main ingredient a polylactic acid-based polymer; and a second resin layer containing as a main ingredient an aliphatic polyester-based resin or an aliphatic-aromatic copolymer polyester-based resin, the uniformity (LUI) of the first resin layer being adjusted to 0.2 μm or less. Therefore, the multilayered biodegradable film retains excellent biodegradability and can improve the uniformity, flexibility, transparency, external appearance characteristics, and degrees of noise of final films, and thus can be utilized as a packaging material in various fields to enable the provision of a high-quality, eco-friendly packaging material.

公开(公告)号：US20240092069A1

公开(公告)日：2024-03-21

申请号：US18071817

申请日：2022-11-30

申请人： SK microworks Co., Ltd.

发明人： SEOKIN LEE ,  Kweon Hyung HAN

IPC分类号： B32B27/36 ,  B32B7/02 ,  B32B27/18

CPC分类号： B32B27/36 ,  B32B7/02 ,  B32B27/18 ,  B32B2270/00 ,  B32B2307/7163 ,  B32B2367/00

摘要： A polyester film includes a laminate including a plurality of first layers and a plurality of second layers alternately stacked on the plurality of first layers. Each of the first layers includes lactic acid residues, and each of the second layers includes terephthalate residues and adipic acid residues. The polyester film has an average equivalent noise level of 78 dB or less from a noise level test for film spinning the polyester film 180 degrees at 800 rpm for 30 seconds or more, and has Young's modulus of 280 kgf/mm2 or less.

公开(公告)号：US20230392042A1

公开(公告)日：2023-12-07

申请号：US18133785

申请日：2023-04-12

申请人： SK microworks Co., Ltd

发明人： Sungjin CHUNG ,  Kweon Hyung HAN ,  Kwangho JANG ,  Sang Mook KIM

IPC分类号： C09D177/06 ,  B29C48/00 ,  B29C48/08

CPC分类号： C09D177/06 ,  B29C48/022 ,  B29C48/08 ,  B29C48/0011 ,  B29K2077/00

摘要： Disclosed is a paint protection film having a storage modulus measured at a temperature of n ° C. according to ASTM D4065 of En, where n is a number representing a temperature in degrees Celsius, wherein E40/E20 is 0.75 or more and 1.1 or less, wherein the paint protection film has a change index dYI of yellowness according to ASTM E313 before and after a UV irradiation, represented by Equation 1 below, of 0.8 or less, where the UV irradiation is performed for 72 hours at an output of 3 W with a light having wavelength from 280 nm to 360 nm:


dYI=|YI−UV_YI|  [Equation 1]



in Equation 1, YI is the yellowness of the paint protection film before the UV irradiation, and UV_YI is the yellowness of the paint protection film after the UV irradiation.

公开(公告)号：US20240343025A1

公开(公告)日：2024-10-17

申请号：US18292425

申请日：2022-06-27

申请人： SK MICROWORKS SOLUTIONS CO., LTD. ,  SK MICROWORKS CO., LTD.

发明人： Jun-Ki PARK ,  Seok-Jong WOO ,  Hyung-Woo CHO ,  Kweon Hyung HAN ,  Kwangho JANG

IPC分类号： B32B27/08 ,  B32B27/28 ,  B32B27/34 ,  B32B37/24

CPC分类号： B32B27/08 ,  B32B27/281 ,  B32B27/285 ,  B32B27/34 ,  B32B37/24 ,  B32B2037/243 ,  B32B2250/02 ,  B32B2250/24 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2307/51 ,  B32B2307/7375 ,  B32B2307/748 ,  B32B2333/08 ,  B32B2367/00 ,  B32B2371/00 ,  B32B2377/00 ,  B32B2457/20

摘要： A lamination film according to one implemented embodiment comprises: a base film; an elastic layer comprising polyether-block-amide; and a primer layer interposed between the base film and the elastic layer, and thus not only has flexibility but also has adhesiveness between heterogeneous films, thereby exhibiting folding durability

公开(公告)号：US20230399537A1

公开(公告)日：2023-12-14

申请号：US18329865

申请日：2023-06-06

申请人： SK microworks Co., LTD. ,  SK microworks solutions Co., LTD.

发明人： Seok-Jong WOO ,  Jun-Ki PARK ,  Hyung-Woo CHO ,  Kwangho JANG ,  Kweon Hyung HAN

IPC分类号： C09D133/14 ,  C08J7/043 ,  C08J7/046

CPC分类号： C09D133/14 ,  C08J7/043 ,  C08J7/046 ,  C08J2433/00 ,  G09F9/301

摘要： A multilayer sheet including a transparent film with a total light transmittance of 85% or more in accordance with ISO 13468, a coating layer disposed on a first surface of the transparent film, and an elastic film disposed below a second surface of the transparent film is disclosed. The Martens hardness HM measured on a surface of the coating layer is 180 N/mm2 or more.