초록 ▼

A process of forming a multi-ply laminate which comprises at least one ply 2 of thermoplastics material forming a transparent outer ply of the laminate, such process comprising assembling the plies 1, 2 of the laminate, degassing its inter-ply space or spaces and subjecting it to bonding conditions

A process of forming a multi-ply laminate which comprises at least one ply 2 of thermoplastics material forming a transparent outer ply of the laminate, such process comprising assembling the plies 1, 2 of the laminate, degassing its inter-ply space or spaces and subjecting it to bonding conditions including environmental laminating pressure distributed over the outside of the or each said thermoplastics outer ply 2 by a moulding plate 3 is characterised by the steps of: enveloping at least the edges of the assembled laminate plier 1, 2 and moulding plate(s) 3 by means 4 defining therewith an edge space 5 in communication with the inter-ply space(s), reducing the pressure P5 within the edge space 5 to commence degassing of the assembly and heating the assembly (curve T) while the main faces of the assembly are subjected to at least atmospheric environmental pressure P6 and subsequently, while the assembly is subjected to environment laminating pressure P6 raising the edge pressure P5 to reduce or eliminate any difference between the edge pressure P5 and the environmental laminating pressure P6 before the assembly reaches its maximum temperature T, and continuing to heat the assembly and maintaining environmental laminating pressure P6 to complete bonding of the laminate plies.

대표청구항 ▼

A process of forming a multi-ply laminate which comprises at least one ply or glass (1) and at least one ply (2) of thermoplastics material, the ply of thermoplastics material forming a transparent outer ply of the laminate, such process comprising assembling the plies (1, 2) of the laminate to crea

A process of forming a multi-ply laminate which comprises at least one ply or glass (1) and at least one ply (2) of thermoplastics material, the ply of thermoplastics material forming a transparent outer ply of the laminate, such process comprising assembling the plies (1, 2) of the laminate to create at least one inter-ply space between mutually adjacent plies, contacting the outer ply with a moulding plate (3) to form an assembly, said assembly having main faces, degassing the inter-ply space and subjecting the plies to bonding conditions including environmental laminating pressure distributed over the outside of the said thermoplastics outer ply (2) by the moulding plate (3), characterised by the steps of: enveloping at least the edges of the assembled laminate plies (1, 2) and moulding plate (3) by means (4) defining therewith an edge space (5) in communication with the inter-ply space, reducing the pressure (P5) within said edge space (5) to commence degassing of the assembly, and heating the assembly (curve T) while the main faces of the assembly are subjected to at least atmospheric environmental pressure (P6) subsequent to said step of reducing the edge space pressure, and while the assembly is subjected to environmental laminating pressure, raising said edge space pressure (P5) to reduce or eliminate any difference between said edge space pressure (P5) and said environmental laminating pressure (P6) before the assembly reaches its maximum temperature (T) and not later than the time when the assembly reaches a temperature at which effective adherence commences between the laminate plies, corresponding to a peel strength of 25 g/cm between the laminates plies, and continuing to heat the assembly and maintaining environmental laminating pressure (P6) to complete bonding of the laminate plies.