RESIN PELLET, AND METHOD FOR PRODUCING MOLDING

• Main Authors: ASADA MITSUNORI, KATAHIRA ERIKO, OKAMOTO MASATO, SUZUKI MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a pellet of EVOH that has a high discharge speed and prevents breaking up in melt molding with an extruder, and a method for producing a molding using such a pellet.SOLUTION: A resin pellet contains an ethylene-vinyl alcohol copolymer (A). The ratio of a crystallinity Xs of (A) in a region at a distance of 0-20 μm from the surface to a crystallinity Xd of (A) in a region at a distance of 20-120 μm from the surface, (Xs/Xd), is 0.85-1.05.SELECTED DRAWING: Figure 1 【課題】押出機を用いた溶融成形の際に、吐出速度が速く、ブレークアップが生じ難いＥＶＯＨのペレット、及びこのようなペレットを用いた成形体の製造方法の提供。【解決手段】エチレン−ビニルアルコール共重合体（Ａ）を含む樹脂ペレットであって、表面からの距離が２０〜１２０μｍの領域における（Ａ）の結晶化度Ｘｄに対する、表面からの距離が０〜２０μｍの領域における（Ａ）の結晶化度Ｘｓの比率（Ｘｓ／Ｘｄ）が、０．８５〜１．０５である樹脂ペレット。【選択図】図１