Method of assembling an inflatable insulation panel
An inflatable or gas-filled insulation panel comprises an envelope having two outer sheets sealed together along edges of the sheets and at least one of the sheets has an outer reflective surface. The envelope encases a plurality of internal films that include a polymeric film having a plurality of reflective stripes disposed thereon and spaced apart on the films. Seals are formed along the gaps or areas between the reflective stripes on the films by application of heat and pressure, which causes the films to seal to each other and the outer sheets at spaced apart intervals. A channel is formed between the outer edges of the films and the outer sheets, and a valve, disposed at an end of the panel, is in fluid communication with the channel for the injection of a fluid, such as an inert gas or air, to inflate panel.
1. A method for assembling an inflatable insulation panel having an envelope with an outer reflective surface and a plurality of internal films, each film being of a polymeric material and having a plurality of reflective surfaces thereon and spaced apart, said method comprising:
providing at least one heating platen for supporting a first and second sheet of laminated material, at least one of which includes the outer reflective surface and an inner polymeric surface, and the internal films positioned between the first and second sheet;
positioning an insulating layer on the platen disposed between the platen and the first and second sheets of laminated material;
aligning a plurality of internal ribs of a die with gaps in the films between the spaced apart reflective surfaces;
aligning two external ribs of the die to form lateral seals extending the width of the panel at lateral ends of the panel, wherein the external ribs are positioned outside the internal ribs along the die, and wherein the external ribs are parallel to the internal films; and
sealing the internal films to one another and to the first and second sheets, including
applying pressure against the two sheets and films with the die and independently heating different portions of the two sheets and films based on the heating platen having a plurality of quadrants, where the temperature of each quadrant is controlled independent of one another.
2. The method of claim 1 , wherein the applying step is performed at a pressure of about 25 lb/in 2 to about 40 lb/in 2 , wherein the heating step is performed at a temperature of about 250° F., and wherein both the applying step and the heating step are performed for a dwell time of about 4.75 seconds.
3. The method of claim 1 , wherein said providing step includes providing the first and second sheet such that a width of the first and the second sheet is greater than a width of the internal films based on lateral edges of the first and second sheets being positioned outside lateral edges of the internal films.
4. The method of claim 3 , wherein the aligning of the internal ribs form lateral seals along the insulation panel between the lateral edges of the internal films and that the external ribs form lateral seals along the insulation panel between the lateral edge of the internal film and the lateral edge of the first or second sheet.
5. A method for assembling an inflatable insulation panel having an envelope with an outer reflective surface and a plurality of internal films, each film being of a polymeric material and having a plurality of reflective surfaces thereon and spaced apart, said method comprising:
providing at least one heating platen for supporting a first and second sheet of laminated material, at least one of which includes the outer reflective surface and an inner polymeric surface, and the internal films positioned between the first and second sheet;
positioning an insulating layer on the platen disposed between the platen and the first and second sheets of laminated material;
aligning a plurality of internal ribs of a die with gaps in the films between the spaced apart reflective surfaces;
aligning two external ribs of the die to form lateral seals extending the width of the panel at lateral ends of the panel, wherein the external ribs are positioned outside the internal ribs along the die, and wherein the external ribs are parallel to the internal films; and
sealing the internal films to one another and to the first and second sheets, including
applying pressure against the two sheets and films with the die and heating the two sheets and films with the heating platen;
wherein the positioning of the insulating layer comprises positioning a first silicone rubber layer between the platen and the first and second sheets of laminated material and positioning a second silicone rubber layer disposed between the first silicone rubber layer and the first and second sheets.
6. The method of claim 5 , wherein the first silicone rubber layer is a high temperature silicone sponge rubber layer with a thickness in a range between ⅛″ and ¼″, and wherein the second silicone rubber layer is an ethylene propylene diene monomer rubber with a thickness of ¼″.
7. The method of claim 6 , wherein a durometer measurement of the ethylene propylene diene monomer rubber of the second silicone rubber layer is 50 A.