US 11,862,135 B2
Polyester sound absorption material, method of manufacturing molded product using same, and molded product manufactured thereby
Hong Mo Koo, Gyeonggi-do (KR); Mi Jung Yun, Gyeonggi-do (KR); Joon Yong Song, Gyeonggi-do (KR); Hyun Dae Cho, Gyeonggi-do (KR); Hyung Joon Youn, Seoul (KR); and Jeong Wook Lee, Gyeongsangbuk-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Dong Jin Industrial Co., Ltd., Gyeongsangbuk-do (KR)
Filed by Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Dong Jin Industrial Co., Ltd., Gyeongsangbuk-do (KR)
Filed on Dec. 7, 2020, as Appl. No. 17/114,253.
Claims priority of application No. 10-2019-0174841 (KR), filed on Dec. 26, 2019.
Prior Publication US 2021/0201881 A1, Jul. 1, 2021
Int. Cl. G10K 11/162 (2006.01); B29C 43/00 (2006.01); B29C 43/20 (2006.01); B29K 105/00 (2006.01); B29K 67/00 (2006.01)
CPC G10K 11/162 (2013.01) [B29C 43/006 (2013.01); B29C 43/203 (2013.01); B29K 2067/003 (2013.01); B29K 2105/25 (2013.01); B29K 2995/0002 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of manufacturing a molded product using a polyester sound absorption material, comprising:
manufacturing a sound absorption material comprising i) a base fiber comprising a polyester resin, ii) an adhesive fiber comprising a low-melting-point polyester resin and iii) a hollow fiber comprising a polyester resin;
preheating the sound absorption material in an oven; and
manufacturing a molded product by pressing the preheated sound absorption material and a skin member together,
wherein the molded product is configured such that the sound absorption material is integrally attached,
the sound absorption material comprises an amount of about 20 to 40 wt % of the base fiber, an amount of about 40 to 60 wt % of the adhesive fiber and an amount of about 15 to 25 wt % of the hollow fiber based on the total weight of the sound absorption material.