公开(公告)号：EP0055802B1

公开(公告)日：1985-04-24

申请号：EP81108319.5

申请日：1981-10-14

Applicant: SWEDLOW, INC.

Inventor： Fischer, William S. ,  Bailey, Charles A.

IPC: B32B27/00 ,  C08J7/04 ,  B64C1/14 ,  B05D5/00

CPC classification number: C08J7/047 ,  B64C1/1484 ,  C08J2333/12 ,  Y10T428/24777 ,  Y10T428/31928

公开(公告)号：EP0055802A3

公开(公告)日：1982-08-04

申请号：EP81108319

申请日：1981-10-14

Applicant: SWEDLOW, INC.

Inventor： Fischer, William S. ,  Bailey, Charles A.

IPC: B32B27/00 ,  C08J07/04 ,  B64C01/14 ,  B05D05/00

CPC classification number: C08J7/047 ,  B64C1/1484 ,  C08J2333/12 ,  Y10T428/24777 ,  Y10T428/31928

Abstract: The invention relates to a plastic transparency having improved resistance to cracking. Plastic transparencies have been used as airplane windows, but have been subject to cracking, especially when subjected to a high humidity environment. The disclosed plastic transparency includes a transparent sheet member and a thin resinous coating overlying the peripheral edge surface of the sheet member. The sheet member is formed of a multi-axially oriented plastic material that is absorptive of moisture, preferably polymethyl methacrylate. The edge coating has a moisture permeation rate substantially less than that of the underlying sheet member, so when the window is exposed to an environment of high or variable humidity, any moisture gradient adjacent the peripheral edge surface is reduced, and the resultant tensile stress and incidence of cracking in the window are correspondingly reduced.

公开(公告)号：EP0055802A2

公开(公告)日：1982-07-14

申请号：EP81108319.5

申请日：1981-10-14

Applicant: SWEDLOW, INC.

Inventor： Fischer, William S. ,  Bailey, Charles A.

IPC: B32B27/00 ,  C08J7/04 ,  B64C1/14 ,  B05D5/00

CPC classification number: C08J7/047 ,  B64C1/1484 ,  C08J2333/12 ,  Y10T428/24777 ,  Y10T428/31928

Abstract: The invention relates to a plastic transparency having improved resistance to cracking. Plastic transparencies have been used as airplane windows, but have been subject to cracking, especially when subjected to a high humidity environment. The disclosed plastic transparency includes a transparent sheet member and a thin resinous coating overlying the peripheral edge surface of the sheet member. The sheet member is formed of a multi-axially oriented plastic material that is absorptive of moisture, preferably polymethyl methacrylate. The edge coating has a moisture permeation rate substantially less than that of the underlying sheet member, so when the window is exposed to an environment of high or variable humidity, any moisture gradient adjacent the peripheral edge surface is reduced, and the resultant tensile stress and incidence of cracking in the window are correspondingly reduced.

Abstract translation: 本发明涉及具有改善的抗开裂性的塑料透明体。 塑料透明胶片已经被用作飞机窗户，但是经受了高温环境的破坏。 所公开的塑料透明体包括透明片状构件和覆盖片状构件的周边边缘表面的薄树脂涂层。 片材由吸收水分的多轴取向塑料材料形成，优选聚甲基丙烯酸甲酯。 边缘涂层的水分渗透速率基本上小于下面的薄片构件的湿度渗透速率，因此当窗口暴露于高或可变湿度的环境时，与周边边缘表面相邻的任何水分梯度减小，并且产生的拉伸应力和 相应减少窗口开裂的发生率。