Heat-sealable materials

• US 3,249,129 A
• Filed: 05/23/1963
• Issued: 05/03/1966
• Est. Priority Date: 07/08/1960
• Status: Expired due to Term

• Current Assignee: John M. Renfroe
• Original Assignee: John M. Renfroe
• Inventors: Renfroe, John M.
• Application Number:
  US04/282,590
• Time in Patent Office: 1,076 Days
• US Class Current: 139/426.00R
• CPC Class Codes: B29C 65/04 Dielectric heating, e.g. high-frequency welding , i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
• CPC Class Codes: B29C 66/03241 Flattening
• 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 66/14 the joint having the same thickness as the thickness of the parts to be joined B29C66/1142 takes precedence
• CPC Class Codes: B29C 66/43 Joining a relatively small portion of the surface of said articles B29C66/45 takes precedence
• CPC Class Codes: B29C 66/69 General aspects of joining filaments bundling articles B65B13/00; interconnecting successive lengths of material B65H69/00
• 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 66/729 Textile or other fibrous material made from plastics
• CPC Class Codes: B29K 2023/00 Use of polyalkenes or derivatives thereof as moulding material
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2077/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2313/00 Use of textile products or fabrics as reinforcement B29K2105/06 takes precedence
• CPC Class Codes: D01F 6/46 of polyolefins
• CPC Class Codes: D04H 1/54 by welding together the fibres, e.g. by partially melting or dissolving in combination with needling D04H1/485

Claims

1. AN ELECTRONICALLY HEAT-SEALABLE TEXTILE FABRIC CAPABLE OF BEING WELDED BY A HIGH FREQUENCY CURRENT COMPRISING SYNTHETIC, HEAT SEALABLE THERMOPLASTIC FILAMENTS CONSISTING OF FROM ABOUT 95 PARTS TO ABOUT 50 PARTS BY WEIGHT OF A THERMOPLASTIC SYNTHETIC POLYOLEFIN RESIN SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE AND POLYETHYLENE HAVING SUBSTANTIALLY UNIFORMLY DISPERSED THEREIN FROM ABOUT 5 PARTS TO ABOUT 50 PARTS BY WEIGHT OF PARTICLES OF A FIBERFORMING SYNTHETIC POLYMERIC CARBONAMIDE WHICH CONTAINS RECURRING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN SEPARATED BY AT LEAST TWO CARBON ATOMS.