Claims
- 1. A method of producing a thermoplastic resin-based shaped profile having superimposed on at least one of its surfaces a polyvinyl fluoride or polyvinylidene fluoride weatherable layer which method comprises:
- (a) extruding a compound comprising a thermoplastic resin through a die set having more than one plane to form a non-planar shaped profile:
- (b) flattening the resulting non-planar shaped profile to form a substantially flat substrate;
- (c) laminating a preformed weatherable layer comprised of polyvinyl fluoride or polyvinylidene fluoride onto the surface of the flattened substrate; and
- (d) shaping the resulting laminated substrate into substantially the shape of the extruded non-planar shaped profile before it was flattened.
- 2. The method of claim 1 in which said ccompound is a polyvinyl chloride compound.
- 3. The method of claim 1 in which said flattening to form a substantially flat substrate is done by passing the non-planar shaped profile through a nip formed by a pair of rolls.
- 4. The method of claim 1 in which said laminating a preformed weatherable layer onto the surface of the flattened substrate is done by passing said weatherable layer and said substrate through a nip formed by a pair of rolls.
- 5. The method of claim 1 in which said flattening and said laminating steps are performed substantially simultaneously.
- 6. The method of claim 5 in which said shaping the resulting laminated substrate into substantially the shape of the extruded non-planar profile article before it was flattened is done by passing said laminated substrate through vacuum fixtures.
- 7. The method of claim 6 in which said vacuum fixtures are within the range of from about 5 to about 20 percent smaller in all dimensions than the extruder die.
- 8. The method of claim 1 in which the temperature of said non-planar shaped profile extrudate is within the range of from about 250.degree. to about 420.degree. F. when it is flattened.
- 9. The method of claim 2 in which the temperature of said non-planar shaped profile extrudate is within the range of from about 350.degree. to about 375.degree. F. when it is flattened.
- 10. The method of claim 4 in which the roll carrying the substantially flat substrate is rubber.
- 11. The method of claim 2 in which said polyvinyl chloride compound comprises a dark color pigment.
Parent Case Info
This is a continuation of application Ser. No. 06/745,151, filed July 17, 1985, now abandoned, which is a continuation of Ser. No. 497,549 filed 5/24/83 now abandoned.
US Referenced Citations (14)
Non-Patent Literature Citations (1)
Entry |
E. I. DuPont De Nemours and Company's Bulletin E-37229 "Elvaloy.RTM. Resin Modifiers 837 and 838 Impact Modifiers for Weatherable PVC." |
Continuations (2)
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Number |
Date |
Country |
Parent |
745151 |
Jul 1985 |
|
Parent |
497549 |
May 1983 |
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