POLYMER STRING

• US 20100041829A1
• Filed: 08/12/2009
• Published: 02/18/2010
• Est. Priority Date: 08/14/2008
• Status: Abandoned Application

• Current Assignee: Luxilon Industries NV
• Original Assignee: Luxilon Industries NV
• Inventors: VAN MALDEREN, Dominique
• Application Number:
  US12/540,093
• Publication Number:
  US 20100041829A1
• Time in Patent Office: Days
• US Class Current: 525/94
• CPC Class Codes: A63B 51/02 Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
• CPC Class Codes: B29C 48/05 Filamentary, e.g. strands
• CPC Class Codes: D01F 1/10 Other agents for modifying properties

Abstract

Polymer string mainly but not exclusively consisting of one or several plastics, characterised in that at least one plastic consists of a thermoplastic material in which at least one alkylbenzyl ester of a 1,2 dicarboxylic acid or one of its derivates is distributed homogeneously, that the alkyl chain of the alkyl-benzyl ester or one of its derivates consists of at least five carbon atoms, and that it is used in a concentration between 0.1 to 5 percent by weight, better between 0.3 to 4 percent by weight, and even better between 0.3 to 1.2 percent by weight.

Claims

1. Polymer string comprising one or several plastics, said plastic or at least one of said plastics comprising thermoplastic material, in which at least one alkyl-benzyl ester of a 1,2 di-carboxylic acid, or one of its derivates is distributed homogenously, and wherein the alkyl chain of the alkyl-benzyl ester or of one of its derivates, comprises at least five carbon atoms and is used in a concentration between 0.1 to 5 percent by weight.

2. Polymer string according to claim 1, wherein said string is fully or partially constructed from thermoplastic polymers, optionally with thermoplastic elastomers, selected from one or several polymers from the following groups:

PET, PLA, PBT, PPT, PA, PEEK, PPS, polyether-polyester block polymer, polyether-polyamide block polymer, TPU, PVDF, other fluorinated polymers, and/or co-polymers of one or several of these compounds.

3. Plastic string according to claim 1, wherein the alkyl-benzyl ester of the 1,2 carboxylic acid comprises a di-ester of phthalic acid or phtalic acid anhydride, with on one hand a benzyl group and on the other hand an alkyl group with 5 to 12 carbon atoms.

4. Polymer string according to claim 1, wherein the alkyl group of the alkyl-benzyl ester, or a derivate thereof, comprises a mixture of various isomers.

5. Method for manufacturing a plastic string according to claim 1, wherein the alkyl-benzyl ester is added in advance to at least one molten plastic or plastic mixture for the creation of a homogeneous thermoplastic mixture.

6. Method according to claim 5, wherein alkyl-benzyl ester is added in a concentration between 0.1 to 5 percent by weight.

7. Method according to claim 5, wherein at least one plastic or plastic mixture is selected from the group of plastics consisting of PET, PLA, PBT, PPT, PA, PEEK, PPS, polyether-polyester block polymer, polyether, polyamide block polymer, TPU, PVDF, other fluorinated polymers, and/or copolymers of one or several of these compounds.

8. Method according to claim 5, wherein the thermoplastic mixture is subsequently extruded and the extruded mixture is further cooled for the creation of a string, which is then stretched, and subsequently relaxed back, and then coiled on a bobbin or the like.

9. Method according to claim 5, wherein the created string is finally subjected to a surface treatment, for example to a plasma treatment in order to improve or adjust the surface characteristics.