Composite material containing a thermoplastic synthetic resin layer

• US 4,379,198 A
• Filed: 09/15/1981
• Issued: 04/05/1983
• Est. Priority Date: 10/01/1980
• Status: Expired due to Fees

• Current Assignee: Dynamit Nobel AG
• Original Assignee: Dynamit Nobel AG
• Inventors: Spielau, Paul, Ulb, Horst, Jaeschke, Hans
• Primary Examiner(s): CANNON, JAMES
• Application Number:
  US06/302,615
• Time in Patent Office: 567 Days
• Field of Search: 428/35, 428/36, 428/280, 428/287, 428/288, 428/290, 428/483, 428/421, 206/524.2, 156/176, 156/322, 156/324
• US Class Current: 442/397
• CPC Class Codes: B29C 65/028 making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
• CPC Class Codes: B29C 65/1412 Infrared [IR] radiation
• CPC Class Codes: B29C 65/1432 direct heating of the surfaces to be joined
• CPC Class Codes: B29C 65/8223 Peel tests
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/45 Joining of substantially the whole surface of the articles methods or apparatus for laminating B32B37/00
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/7212 characterised by the composition of the fibres
• CPC Class Codes: B29C 66/7294 Non woven mats, e.g. felt
• CPC Class Codes: B29C 66/7392 characterised by the material of at least one of the parts being a thermoplastic
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/83413 cooperating rollers, cylinders or drums
• CPC Class Codes: B29C 66/91411 of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
• CPC Class Codes: B29C 66/91645 by steps
• CPC Class Codes: B29C 66/919 characterised by specific temperature, heat or thermal flux values or ranges specific electrical resistance values B29C66/81262
• CPC Class Codes: B29K 2023/04 Polymers of ethylene
• CPC Class Codes: B29K 2023/0633 LDPE, i.e. low density polyethylene
• CPC Class Codes: B29K 2023/065 HDPE, i.e. high density polyethylene
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2027/08 PVDC, i.e. polyvinylidene chloride
• CPC Class Codes: B29K 2027/16 : PVDF, i.e. polyvinylidene fluoride
• CPC Class Codes: B29K 2033/08 : Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
• CPC Class Codes: B29K 2033/12 : Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B29K 2033/20 : PAN, i.e. polyacrylonitrile
• CPC Class Codes: B29K 2067/00 : Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2267/00 : Use of polyesters or derivatives thereof as reinforcement
• CPC Class Codes: B29K 2309/08 : Glass
• CPC Class Codes: B32B 2262/0276 : Polyester fibres
• CPC Class Codes: B32B 27/12 : next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/304 : comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: C08J 5/121 : by heating
• CPC Class Codes: Y10T 428/27 : Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
• CPC Class Codes: Y10T 428/273 : of coating
• CPC Class Codes: Y10T 428/3154 : Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 442/677 : Fluorinated olefin polymer or copolymer sheet or film [e.g., TeflonR, etc.]
• CPC Class Codes: Y10T 442/678 : Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]
• CPC Class Codes: Y10T 442/682 : Needled nonwoven fabric

Abstract

A composite material, especially suitable for chemical apparatus construction is formed of a layer of a thermoplastic synthetic resin and a textile layer pressed onto the resin layer in the heated condition. The textile layer is a mechanically prestrengthened, polyester fiber mat bound chemically with a binder consisting of a synthetic resin dispersion of polymers and/or copolymers of esters of acrylic and methacrylic acid and of acrylonitrile. Needling is a preferred procedure for mechanically prestrengthening the mat.

Claims

1. A composite material, especially suitable for chemical apparatus construction comprising a layer of a thermoplastic synthetic resin and a textile layer pressed onto the resin layer in the heated condition;

said textile layer consisting of a mechanically prestrengthened, polyester fiber mat bound chemically with a binder consisting essentially of a synthetic resin dispersion of polymers of acrylic or methacrylic acid esters and/or copolymers of esters of acrylic or methacrylic acid and of acrylonitrile.

2. A composite material according to claim 1, wherein the polyester fiber mat has a weight per unit area of 100-350 g/m² with a proportion of binder of 10-50% of the weight per unit area.

3. A composite material according to claim 1 or 2, wherein the polyester fiber mat is heat-set before being laminated to the resin layer.

4. A composite material according to claim 1 or 2, wherein the thermoplastic synthetic resin layer consists of a polyolefin comprising low-density polyethylene, high-density polyethylene or polypropylene.

5. A composite material according to claim 1 or 2, wherein the thermoplastic synthetic resin layer consists of polyvinylidene fluoride.

6. A composite material according to claim 1, wherein the polyester mat is reinforced by needling the fiber together prior to application of the binder.

7. A method for producing a composite material which comprises chemically bonding the fibers of a polyester fiber mat which has been needled with a binder consisting essentially of a dispersion of polymers of acrylic or methacrylic acid esters and/or copolymers of esters of acrylic acid or methacrylic acid and acrylonitrile, and thereafter laminating the polyester mat to a layer of a synthetic resin by application of heat and pressure.