HOMOGENEOUS FILLED YARN

• US 20200131672A1
• Filed: 07/13/2018
• Published: 04/30/2020
• Est. Priority Date: 07/14/2017
• Status: Active Application

• Current Assignee: Avient Protective Materials BV (Avient Corp.)
• Original Assignee: DSM IP Assets BV (DSM-Firmenich AG)
• Inventors: SIMMELINK, Joseph Arnold Paul Maria, HACKER, Christoph, MARISSEN, Roelof
• Application Number:
  US16/629,986
• Publication Number:
  US 20200131672A1
• Time in Patent Office: Days
• CPC Class Codes: D01F 1/02 Addition of substances to the spinning solution or to the melt addition of substances to viscose D01F2/08
• CPC Class Codes: D01F 6/04 from polyolefins
• CPC Class Codes: D01F 8/06 with at least one polyolefin as constituent
• CPC Class Codes: D10B 2321/0211 high-strength or high-molecular-weight polyethylene, e.g. ultra-high molecular weight polyethylene [UHMWPE]
• CPC Class Codes: Y10T 428/2929 Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament

Abstract

The invention is concerned with filled multifilament yarn according to the present invention whereby the filler ratio, χ, in the yarn is greater than 0.004 times the IV of the UHMWPE present in the multifilament yarn (IV^Y_UH), i.e. χ≥0.004 g/dL*IVy_H* and whereby the tenacity (TEN, in cN/dtex) of the filled multifilament yarn is such that TEN≥IV^Y_UH*(1.5-3.25*χ), or whereby the tenacity of a filled monofilament in the yarn is ten≥IV^Y_UH*(2-4.35*_X). The invention is further concerned with a method to manufacture said multifilament yarn and articles comprising said multifilament yarn.

Claims

1. A filled multifilament yarn comprising

a UHMWPE with an intrinsic viscosity (IV_UH^Y) of <

20 dL/g,

a filler with a numerical average diameter of at most 20 μ

m in an amount such that the ratio (χ

) of the mass of filler to the combined masses of UHMWPE and filler is between 0.02 and 0.50,

with χ

≥

0.004 g/dL*IV_UH^Y,

whereby the tenacity (TEN) of the filled multifilament yarn is such that TEN≥

IV_UH^Y*(1.5-3.25*χ

).

3. The filled multifilament yarn of claim 1 wherein the ratio (χ

) of the mass of filler to the combined masses of UHMWPE and filler is between 0.04 and 0.40.

4. The filled multifilament yarn of claim 1 wherein χ

≥

0.0045 g/dL*IV_UH^Y.

5. The filled multifilament yarn of claim 1 wherein the yarn has a tenacity of at least 5.0 cN/dtex.

6. The filled multifilament yarn of claim 1 wherein the diameter of the filler is at least 1 μ

m.

7. The filled multifilament yarn of claim 1 wherein the diameter of the filler is at most 16 μ

m.

8. The filled multifilament yarn of claim 1 wherein the filler has an aspect ratio of at least 2.0.

9. The filled multifilament yarn of claim 1 wherein IV_UH^Y is at most 18 dL/g.

10. Method for preparing the filled multifilament yarn of claim 1 comprising the steps of

a) providing a UHMWPE having an intrinsic viscosity (IV_UH^O) of less than 24 dL/g,

b) providing a filler with a diameter of at most 20 μ

m,

c) preparing a solution of the UHMWPE in a solvent, the solution comprising said filler in an amount such that the ratio (χ

) of the mass of filler to the combined masses of UHMWPE and filler is between 0.02 and 0.50,

d) spinning the solution obtained in step c) through a multiple orifice die plate to form a solvent containing filled multifilament yarn,

e) at least partially removing the solvent from the filled yarn of step d) before, during or after drawing the filled yarn at a total draw ratio of at least 20,

to obtain said filled multifilament yarn,

whereby the amount of filler is chosen such that χ

≥

0.003 g/dL*IV_UH^O.

11. The method of claim 10 wherein χ

is between 0.04 and 0.40.

12. The method of claim 10 wherein χ

≥

0.0035 g/dL*IV_UH^O.

13. The method of claim 10, wherein IV_UH^O is less than 20 dL/g.

14. An article comprising the filled multifilament yarn of claim 1.

15. The article of claim 14 wherein the article is selected from the group consisting of fishing lines, fishing nets, ground nets, cargo nets, curtains, kite lines, dental floss, tennis racquet strings, canvas, woven cloths, nonwoven cloths, webbings, battery separators, medical devices, capacitors, pressure vessels, hoses, umbilical cables, automotive equipment, power transmission belts, building construction materials, cut resistant articles, stab resistant articles, incision resistant articles, protective gloves, composite sports equipment, skis, helmets, kayaks, canoes, bicycles and boat hulls, speaker cones, high performance electrical insulation, radomes, sails, and geotextiles.

2. A filled multifilament yarn comprising

a UHMWPE with an intrinsic viscosity (IV_UH^Y) of <

20 dL/g,

a filler with a numerical average diameter of at most 20 μ

m in an amount such that the ratio (χ

) of the mass of filler to the combined masses of UHMWPE and filler is between 0.02 and 0.50, with χ

>

0.004 g/dL*IV_UH^Y,

whereby the tenacity of a filled monofilament in the filled multifilament yarn is ten≥

IV_UH^Y*(2-4.35*χ

).