Vapour deposition foam
A vapor deposition and foaming technology, applied in gaseous chemical plating, transportation and packaging, rigid containers, etc., can solve problems such as uneven formation and difficulty in obtaining gas barrier properties of vapor deposition films
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0062] 1. Preparation of the foamed plastic molded body 10:
[0063] The foamed plastic molded body 10 is produced by molding the above-described plastic or a composition comprising the above-described plastic blended with a suitable blending agent (eg, antioxidant, etc.), followed by foaming during or after the molding step.
[0064] As the above-mentioned molding means, known molding means such as extrusion molding, injection molding, and compression molding can be exemplified. After forming, a second forming such as stretch forming is allowed to proceed further. The desired shape is achieved by the above-mentioned forming.
[0065] Foaming can be carried out by chemical foaming using a blowing agent such as sodium bicarbonate or azo compounds, or by physical foaming using an inert gas as a blowing agent. In the present invention, it is necessary to suppress foaming in the surface layer portion 10a, therefore, it is desirable to employ physical foaming that can easily supp...
Embodiment 1
[0124] A PET resin for a bottle containing 0.15% nitrogen and having an intrinsic viscosity (IV) of 0.84 dL / g was injected into a cavity in which the pressure was maintained at 5 MPa and the temperature was 30° C. by blowing high-pressure air, and after that, the The pressure therein was maintained at 50MPa for 18 seconds. After another 12 seconds, the mold was opened. A preform of a test tube-shaped container having a total length of about 110 mm was obtained in a substantially non-foamed state in which the gas had been dissolved and had a smooth surface.
[0125] The preform was further heated and foamed, and directly blow-molded to obtain a foam blow-molded bottle having a body portion of 600 μm in thickness and a volume of about 500 ml. Heating was performed from both sides of the outer surface side and the inner surface side, and the heating conditions were adjusted so that the temperature on the inner surface side of the preform (at a portion 45 mm from the top surface ...
Embodiment 2
[0130] A preform was formed in the same manner as in Example 1, except that the heating conditions were adjusted so that the temperature of the preform on the inner surface side when heated was 102°C, a bottle was formed, and a film was vapor-deposited thereon.
[0131] The oxygen permeability of the resulting bottle whose inner surface was vapor-deposited was as good as 0.004 cc / bottle / day (before vapor deposition, it was 0.06 cc / bottle / day).
[0132] The average bubble rate of the inner surface layer portion of the bottle body was 19%, and that of the outer surface layer portion was 24%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More