US 12,103,290 B2
Low-temperature dry preparation method for flame-retardant fabric, and flame-retardant mattress cover
Zhanggen Ni, Rugao (CN); and Peng Shen, Rugao (CN)
Assigned to HEALTHCARE CO., LTD., Rugao (CN)
Appl. No. 17/609,762
Filed by HEALTHCARE CO., LTD., Rugao (CN)
PCT Filed May 8, 2020, PCT No. PCT/CN2020/089202
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/224637, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 201910378183.3 (CN), filed on May 8, 2019; and application No. 202010038256.7 (CN), filed on Jan. 14, 2020.
Prior Publication US 2022/0219443 A1, Jul. 14, 2022
Int. Cl. B32B 37/12 (2006.01); A47C 31/00 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 7/12 (2006.01); B32B 37/00 (2006.01); B32B 37/08 (2006.01); B32B 37/10 (2006.01); B32B 38/18 (2006.01)
CPC B32B 37/1207 (2013.01) [A47C 31/001 (2013.01); B32B 5/022 (2013.01); B32B 5/265 (2021.05); B32B 7/12 (2013.01); B32B 37/0053 (2013.01); B32B 37/08 (2013.01); B32B 37/10 (2013.01); B32B 37/1284 (2013.01); B32B 2037/1215 (2013.01); B32B 38/1808 (2013.01); B32B 2262/062 (2013.01); B32B 2305/18 (2013.01); B32B 2307/3065 (2013.01); B32B 2309/02 (2013.01); B32B 2317/10 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A low-temperature dry preparation method for forming a flame-retardant fabric from a first substrate and a second substrate, the method comprising:
step S1: unreeling a roll of the first substrate and laying the first substrate on a conveyer belt, wherein the first substrate is a fabric layer;
step S2: heating a hot melt adhesive until being in a flowable state;
step S3: spraying or coating the hot melt adhesive in the flowable state to a surface of the first substrate with a glue nozzle assembly, and controlling Tw1 to satisfy a relationship: (T1−5° C.)<Tw1≤(T1−1° C.), wherein Tw1 is an initial temperature of the hot melt adhesive when it contacts the surface of the first substrate, and T1 is a heat deflection temperature of the first substrate;
step S4: unreeling a roll of the second substrate, and feeding the second substrate and the first substrate into a pressure roller simultaneously, wherein the second substrate is a flame-retardant needle punched cotton layer, the hot melt adhesive on the surface of the first substrate faces to the second substrate, the hot melt adhesive is not absolutely solidified, and controlling Tcuring, Tw2, T2 and T1 to satisfy following formula: Tcuring<Tw2, and (Tw2−10° C.)<T2<T1, wherein Tcuring is a curing temperature of the hot melt adhesive, Tw2 is an initial temperature of the hot melt adhesive when it contacts a surface of the second substrate, and T2 is a heat deflection temperature of the second substrate; and
step S5: cold pressing the first substrate, the hot melt adhesive and the second substrate by a pressure roller assembly, and controlling Tf and Tcuring to satisfy following formula: Tf<Tcuring during the cold pressing, wherein Tf is a pressing temperature, then solidifying the hot melt adhesive and compounding the second substrate and the first substrate to form a composite flame-retardant fabric.