SOUND-ABSORBING, RESISTANT PANELS AND PROCESS FOR MAKING SAME
A process of making a sound-absorbing panel, including a. pre-mixing gypsum plaster with water; b. adding a glycoside compound; c. injecting air into the obtained slurry of step b) and mixing; d. casting the aerated slurry; e. setting the cast slurry.
1 - 29 . (canceled)
30 . A process of making a sound-absorbing panel, comprising:
a. pre-mixing gypsum plaster with water;
b. adding a glycoside compound;
c. injecting air into the obtained slurry of step b) and mixing;
d. casting the aerated slurry, and
e. setting the cast slurry.
31 . The process of claim 30 , wherein the glycoside compound is the sole foaming agent.
32 . The process of claim 30 , wherein fibers represent less than 0.01% by weight of the set gypsum plaster.
33 . The process as claimed in claim 30 , wherein the glycoside compound is an alkylpolyglycoside or alkylpolyglucoside.
34 . The process of claim 33 , wherein the glycoside compound is a C4-C16 alkylpolyglycoside or a C4-C16 alkylpolyglucoside.
35 . The process of claim 30 , wherein step a) comprises pre-mixing the gypsum plaster with water and a blocking agent.
36 . The process of claim 30 , further comprising introducing an unblocking agent into the aerated slurry.
37 . The process of claim 30 , wherein step a) comprises pre-mixing the gypsum plaster with water and a retarding agent.
38 . The process of claim 30 , wherein the casting of the aerated slurry comprises depositing the aerated slurry onto a facer, said process further comprising:
covering the deposited slurry with another facer,
forming a ribbon from the deposited slurry, and
cutting the ribbon into panels.
39 . The process as claimed in claim 30 , further comprising depositing the aerated slurry into moulds.