US 12,402,727 B2
Multilayer blow molded board and its composition
Yixiang Jiang, Yuyao (CN); and Jinglei Jiang, Yuyao (CN)
Assigned to THREE STONE, LLC., San Jose, CA (US)
Filed by THREE STONE, LLC., San Jose, CA (US)
Filed on Oct. 31, 2019, as Appl. No. 16/670,986.
Claims priority of application No. 201910678593.X (CN), filed on Jul. 25, 2019.
Prior Publication US 2021/0022502 A1, Jan. 28, 2021
Int. Cl. B32B 27/32 (2006.01); A47B 96/20 (2006.01); B32B 3/30 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01)
CPC A47B 96/20 (2013.01) [B32B 3/30 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); B32B 27/327 (2013.01); B32B 2250/242 (2013.01); B32B 2262/101 (2013.01); B32B 2264/10 (2013.01); B32B 2479/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multilayer blow-molded board for furniture products, comprising:
an upper layer board which includes a first outer layer, a first inner layer and a first intermediate layer formed between the first outer layer and the first inner layer; and
a lower layer board which includes a second outer layer, a second inner layer and a second intermediate layer formed between the second outer layer and the second inner layer, the upper layer board and the lower layer board being blow-molded to define a hollow structure therebetween, wherein the lower layer board is recessed upward such that the second inner layer of the lower layer board and the first inner layer of the upper layer board fuse with each other to form a supporting contact structure, wherein a peripheral outer edge of the upper layer board having a first outer bent wall and a peripheral outer edge of the lower layer board having a second outer bent wall, such that the first inner layer of the first outer bent wall fuses with the second inner layer of the second outer bent wall, wherein the lower layer board is recessed upward to form a plurality of supporting contact structures each having a strip shape, wherein each of the first outer layer of the upper layer board and the second outer layer of the lower layer board comprises a high-density polyethylene, wherein each of the first intermediate layer of the upper layer board and the second intermediate layer of the lower layer board comprises a mixture of the high-density polyethylene having a mass percentage of 70-85% and a calcium carbonate having a mass percentage of 15-30%, wherein each of the first inner layer of the upper layer board and the second inner layer of the lower layer board comprises a metallocene polyethylene.