Method for molding a body in a mold

Patent metadata

Field	Value
Publication number	US-11261349-B2
Application number	US-201615578137-A
Country	US
Kind code	B2
Filing date	Jul 14, 2016
Priority date	Jul 17, 2015
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

Adhesive tape having a carrier material comprising the following layers: a textile composed of fibers having a softening point greater than or equal to 200° C., and coated with fluoropolymers or silicone polymers, to the top side of which textile a first film composed of fluoropolymers is applied over the whole surface and to the bottom side of which textile a second film is applied over the whole surface, wherein a self-adhesive mass is applied to one side of the carrier material.

First claim

The invention claimed is:

1. A method comprising:
applying an adhesive tape to an inner side of a mold;
distributing at least one material layer over the adhesive tape;
curing the at least one material layer, thereby forming a body; and
removing the body from the mold,

wherein:
the adhesive tape comprises a self-adhesive mass and further comprises a carrier material comprising a textile;
the textile comprises a top side, a bottom side, and at least one fiber comprising a coating;
the at least one fiber has a softening point greater than or equal to 200° C.;
the coating comprises at least one first fluoropolymer or at least one silicone polymer;
a first film comprising at least one second fluoropolymer covers the whole of the top side; and
a second film covers the whole of the bottom side.

2. The method as claimed in claim 1 , wherein:
the at least one second fluoropolymer is present at 50 wt. % relative to the total weight of the first film; or
the first film consists of the at least one second fluoropolymer.

3. The method as claimed in claim 1 , wherein the at least one first fluoropolymer is present and comprises a polytetrafluoroethylene (PTFE), a poly(ethylene-co-tetrafluoroethylene) (ETFE), a poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP), a poly(1,1-difluoroethene) (PVDF), a perfluoralkoxy polymer (PFA), or a mixture thereof.

4. The method as claimed in claim 1 , wherein the coating further comprises a homopolymer of ethylene, a copolymer of ethylene, a propylene, a butylene, a polyethylene terephthalate (PET), a polyamide, a polyurethane, a polyoxymethylene, a polyvinyl chloride (PVC), a polyethylene naphthalate (PEN), an ethylene vinyl alcohol (EVOH), a polyvinylidene chloride (PVDC), a polyvinylidene fluoride (PVDF), a polyacrylonitrile (PAN), a polycarbonate (PC), a polyamide (PA), a polyethersulfone (PES), a polyimide (PI), a polyarylene sulfide, or a polyarylene oxide.

5. The method as claimed in claim 1 , wherein at least one of the first film and the second film is between 15 and 350 μm thick.

6. The method as claimed in claim 1 , wherein the textile is a non-woven fabric.

7. The method as claimed in claim 1 , wherein the at least one fiber comprises a carbon fiber or a glass fiber.

8. The method as claimed in claim 1 , wherein the textile further comprises a glass fiber fabric.

9. The method as claimed in claim 1 , wherein the self-adhesive mass is based on an acrylate or a silicone.

10. The method as claimed in claim 1 , wherein the self-adhesive mass has a mass application between 10 and 200 g/m 2 .

11. The method as claimed in claim 1 , further comprising applying a release agent to the inner side before application of the adhesive tape.

12. The method as claimed in claim 1 , wherein the at least one material layer is cured under a vacuum.

13. The method as claimed in claim 1 , wherein the at least one second fluoropolymer comprises a polytetrafluoroethylene (PTFE), a poly(ethylene-co-tetrafluoroethylene) (ETFE), a poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP), a poly(1,1-difluoroethene) (PVDF), a perfluoralkoxy polymer (PFA), or a mixture thereof.

14. The method as claimed in claim 1 , wherein the first film further comprises a homopolymer of ethylene, a copolymer of ethylene, a propylene, a butylene, a polyethylene terephthalate (PET), a polyamide, a polyurethane, a polyoxymethylene, a polyvinyl chloride (PVC), a polyethylene naphthalate (PEN), an ethylene vinyl alcohol (EVOH), a polyvinylidene chloride (PVDC), a polyvinylidene fluoride (PVDF), a polyacrylonitrile (PAN), a polycarbonate (PC), a polyamide (PA), a polyethersulfone (PES), a polyimide (PI), a polyarylene sulfide, or a polyarylene oxide.

15. The method as claimed in claim 1 , wherein the textile is a woven fabric.

16. The method as claimed in claim 11 , wherein the release agent comprises a polyvinyl alcohol or a silicone wax.

17. The method as claimed in claim 11 , wherein the release agent is based on a silane or a siloxane.

18. The method as claimed in claim 8 , wherein the glass fiber fabric comprises a coating of at least one third fluoropolymer.

Assignees

• Tesa Se

Inventors

• Bernt Stephan
• Kerep Patrick

Classifications

• C09J2400/10

  Presence of inorganic materials · CPC title

• C09J2400/263

  in the substrate · CPC title

• C09J2427/006

  in the substrate · CPC title

• B29C33/60

  Releasing, lubricating or separating agents {(in general C10M)} · CPC title

• B29C70/543

  Fixing the position or configuration of fibrous reinforcements before or during moulding (for non-woven fabrics D04H3/08) · CPC title