Patent US4410633A successfully refreshed from Google Patents.
Patent EP0480451A1 successfully refreshed from Google Patents.
EP0480451A1
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EP
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Process for preparing thermoinsulating and/or structural formed articles and products so obtained
Assignee: Basell Poliolefine Italia SRL
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Filing: 1991-10-11
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Granted: —
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Expires: 2011-10-11
Abstract
Abstract A process for preparing thermoinsulating and/or structural formed articles comprising at least one of the following steps: a) depositing a thermoinsulating preform (4) onto a thermoforming mold (1); b) bringing a thermoplastic polymer plate or sheet (6) to the softening temperature; c) thermoforming said plate or sheet (6) on the thermoinsulating parison (4).
Inventors
- 👤 Antonio Addeo
- 👤 Lucio Pinetti
- 👤 Annibale Vezzoli
- 👤 Francesco Mascia
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:10
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/16; B29C51/10; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2025/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A process for preparing thermoinsulating and/or structural formed articles, which comprises at least one of the following steps: a) depositing a thermoinsulating preform onto a thermoforming mold; b) bringing a thermoplastic polymer plate or sheet to the softening temperature or to a slightly higher temperature; and c) thermoforming the plate or sheet on the thermoinsulating preform.
Claim 2
Dependent Claim
17 words
The process according to claim 1, wherein the thermoinsulating preform is made of a foamed polymeric material.
Claim 3
Dependent Claim
27 words
The process according to claim 2, wherein the thermoinsulating preform is made of foamed polystyrene or foamed impact-resistant polystyrene, or of foamed polypropylene or foamed impact-resistant polypropylene.
Claim 4
Dependent Claim
28 words
The process according to any of the preceding claims, wherein the plate or sheet to be thermoformed is made of polystyrene, impact-resistant polystyrene, styrene mixtures, polypropylene, impact-resistant polypropylene.
Claim 5
Dependent Claim
27 words
The process according to any of the preceding claims, wherein the plate or sheet to be thermoformed has an average thickness ranging from 0.5 to 20 mm.
Claim 6
Dependent Claim
28 words
The process according to any of the preceding claims, wherein the plate or sheet is brought to a temperature higher than 100°C, preferably ranging from 120° to 200°C.
Claim 7
Dependent Claim
16 words
Formed articles prepared by means of the process as claimed in any of the preceding claims.
References Cited (Backward Citations)
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