Support material for laminate shaping, product laminate-shaped by using the same, and laminate-shaped product production method
A laminate shaping support material is provided which 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 method of forming a resin composition into a laminate shaping support material comprising:
heat-melting 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; and
forming the heat-melted resin composition into the laminate shaping support material,
wherein a proportion of the polyvinyl alcohol resin is from 50 to 95 wt. % based on an entirety of the laminate shaping support material, and
wherein a proportion of the block copolymer is from 5 to 50 wt. % based on the entirety of the laminate shaping support material.
2. The method according to claim 1 , wherein the block copolymer has an acid value of 0.5 to 20 mg CH 3 ONa/g.
3. A laminate-shaped product production method comprising:
laying a layer of a laminate-shaping support material 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,
wherein the laminate-shaping support material consists of 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,
wherein a proportion of the polyvinyl alcohol resin is from 50 to 95 wt. % based on an entirety of the laminate shaping support material, and
wherein a proportion of the block copolymer is from 5 to 50 wt. % based on the entirety of the laminate shaping support material.