Support material for laminate shaping, product laminate-shaped by using the same, and laminate-shaped product production method

Abstract

A laminate-shaping support material includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.

1 . A laminate shaping support material comprising a resin composition comprising a polyvinyl alcohol resin including a structural unit having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point. 
     
     
         2 . The laminate shaping support material according to  claim 1 , wherein the structural unit is a structural unit having a 1,2-diol structure at its side chain. 
     
     
         3 . The laminate shaping support material according to  claim 2 , wherein the structural unit having the 1,2-diol structure at its side chain is a structural unit represented by the following general formula (1): 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently each a hydrogen atom or a C1 to C4 alkyl group, X is a single bond or a bonding chain, R 4 , R 5  and R 6  are independently each a hydrogen atom or a C1 to C4 alkyl group. 
     
     
         4 . The laminate shaping support material according to  claim 7 , wherein the block copolymer has an acid value of 0.5 to 20 mg CH 3 ONa/g. 
     
     
         5 . A laminate comprising:
 the laminate-shaping support material according to  claim 1  and   a model material,   wherein a layer of the laminate-shaping support material and a layer of the model material are alternately laid one on another in a fluid state.   
     
     
         6 . A laminate-shaped product production method comprising the steps of:
 alternately laying a layer of the laminate-shaping support material according to  claim 1  and a layer of a model material one on another in a fluid state;   solidifying the support material and the model material; and   removing the support material.   
     
     
         7 . A laminate shaping support material comprising a resin composition comprising
 a polyvinyl alcohol resin, and   a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group.   
     
     
         8 . A laminate comprising:
 the laminate-shaping support material according to  claim 7  and   a model material,   wherein a layer of the laminate-shaping support material and a layer of the model material are alternately laid one on another in a fluid state.   
     
     
         9 . A laminate-shaped product production method comprising the steps of:
 alternately laying a layer of the laminate-shaping support material according to  claim 7  and a layer of a model material one on another in a fluid state;   solidifying the support material and the model material; and   removing the support material.