Monofilament for Use in Screen Gauze and Screen Gauze Using the Same

Abstract

A core-sheath composite type monofilament for use in a screen gauze comprising the core 1 formed by a fiber-forming polymer 4 containing a material 3 having a property of absorbing light at wavelengths of 350 nm to 450 nm and the sheath 2 formed by a fiber-forming polymer 5 , the core-sheath composite type monofilament having average reflectance of 15% or less to light at wavelengths of 350 nm to 450 nm, and a screen gauze using the same. The monofilament is free from strength reduction, scum generation and abrasion of related parts such as reed, and makes no difficulty in ink-release, and requires no dyeing process and thus no additional cost therefor.

1 . A core-sheath composite type monofilament for use in a screen gauze comprising the core formed by a fiber-forming polymer containing a material having a property of absorbing light at wavelengths of 350 nm to 450 nm and the sheath formed by a fiber-forming polymer, the core-sheath composite type monofilament having average reflectance of 15% or less to light at wavelengths of 350 nm to 450 nm.  
   
   
       2 . A core-sheath composite type monofilament according to  claim 1 , wherein the light-absorbing material is present in an amount of 0.1 to 2.0% by weight based on the total core.  
   
   
       3 . A core-sheath composite type monofilament according to  claim 1 , wherein the cross-sectional area ratio of core to sheath is in a range of 40:60 to 90:10.  
   
   
       4 . A core-sheath composite type monofilament according to  claim 1 , wherein the elongation at break is 20 to 30% and the strength at break is 5.5 cN/dtex or more.  
   
   
       5 . A core-sheath composite type monofilament according to  claim 1 , wherein the core comprises polyester having an intrinsic viscosity of 0.60 or more.  
   
   
       6 . A core-sheath composite type monofilament according to  claim 1 , wherein the sheath comprises nylon 6 having a relative viscosity of 2.0 or more.  
   
   
       7 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 1 .  
   
   
       8 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 2 .  
   
   
       9 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 3 .  
   
   
       10 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 4 .  
   
   
       11 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 5 .  
   
   
       12 . A screen gauze characterizing in that at least one of warp and weft comprises the core-sheath composite type monofilament according to  claim 6.