PVC foaming wood plastic composite material

Abstract

The invention discloses a PVC foaming wood plastic composite material which is produced by processing the raw materials based on the parts by weight: 100 parts of polyvinyl chloride (PVC), 40-50 parts of lignified plant fiber, 10-20 parts of active light calcium, 3-6 parts of calcium zinc complex stabilizer, 1-3 parts of compound-type foaming agent, 0.5-1.5 parts of lubricating agent OPE wax, 0.5-1 part of compound lubricating agent and 3-8 parts of foaming conditioning agent; the raw materials are evenly mixed by a mixing machine and then are directly put into a screw extruder to be extruded and molded at the temperature of 160-170 DEG C. The PVC foaming wood plastic composite material is added with full dose of heat stabilizer in the process of blending and processing, so that the degradation temperature of plastics can be increased, thermal degradation of the plastics and carbonization of wood powder in the process of mixing and forming can be prevented, and the operation of extruding and molding can be completed in one step, thus greatly simplifying the production technique and reducing the production cost.

Description

Technical field:

[0001] The invention relates to a PVC foamed wood-plastic material. Background technique:

[0002] In addition to pure natural materials, the current building decoration materials such as floor or wall decoration boards mainly use wood fiber as the main raw material to process composite materials and completely synthetic materials such as PVC boards. Due to the ingredients of the current PVC foamed wood-plastic, wood fibers such as wood flour have poor thermal stability, and the cellulose and lignin in them are easy to decompose at high temperatures, and they will explode at about 190°C in the presence of oxygen. At the same time, because the processing temperature and decomposition temperature of polyvinyl chloride are also very close, in order to prevent the thermal degradation of plastics and wood powder in the process of mixing and molding, a two-step method is mainly used at present. , wood powder, and various additives for granulation; the second step...

Examples

Embodiment 1

[0017] Take 100 parts of polyvinyl chloride, 40 parts of wood flour, 15 parts of active light calcium, said active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 3 parts, compound foaming agent: 2 parts, lubricating Agent OPE wax: 0.8 parts, composite lubricant: 0.5 parts, foaming regulator: 4 parts, the above-mentioned mixture of PVC plastic, wood flour and various additives is mixed evenly by a mixer and directly added to the screw extruder , Extruded at 160°C.

[0018] The zinc-calcium composite stabilizers described in the embodiments of the present invention are all zinc-calcium composite stabilizers P790 produced and sold by Shanghai Boao Electronics Co., Ltd., and the compound foaming agents are all compound foams produced and sold by Shanghai Boao Electronics Co. Matching foaming agent FA18, the composite lubricant is the composite lubricant P90 produced and sold by Shanghai Boao Electronics Co., Ltd., and the foaming regulator is the foam...

Embodiment 2

[0020] Take 100 parts of polyvinyl chloride, 25 parts each of sawdust and cotton stalk powder, 20 parts of active light calcium, the active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 6 parts, compound foaming agent: 3 parts, lubricant OPE wax: 1.5 parts, composite lubricant: 0.8 parts, foam regulator: 8 parts, mix the mixture of PVC plastic, sawdust, cotton stalk powder and various additives through a mixer and add directly Put it into a screw extruder and extrude it at 165°C.

Embodiment 3

[0022] Take 100 parts of polyvinyl chloride, 30 parts of cotton stalk powder, 10 parts of rice bran, 10 parts of active light calcium, the active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 5 parts, compound foaming agent : 2 parts, lubricant OPE wax: 1 part, composite lubricant: 1 part, foam regulator: 3 parts, mix the above material mixture through a mixer and directly add it to the screw extruder, at 160~170 ℃ extruded hair can be.

Technical field:

[0001] The invention relates to a PVC foamed wood-plastic material. Background technique:

[0002] In addition to pure natural materials, the current building decoration materials such as floor or wall decoration boards mainly use wood fiber as the main raw material to process composite materials and completely synthetic materials such as PVC boards. Due to the ingredients of the current PVC foamed wood-plastic, wood fibers such as wood flour have poor thermal stability, and the cellulose and lignin in them are easy to decompose at high temperatures, and they will explode at about 190°C in the presence of oxygen. At the same time, because the processing temperature and decomposition temperature of polyvinyl chloride are also very close, in order to prevent the thermal degradation of plastics and wood powder in the process of mixing and molding, a two-step method is mainly used at present. , wood powder, and various additives for granulation; the second step...

Examples

Embodiment 1

[0017] Take 100 parts of polyvinyl chloride, 40 parts of wood flour, 15 parts of active light calcium, said active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 3 parts, compound foaming agent: 2 parts, lubricating Agent OPE wax: 0.8 parts, composite lubricant: 0.5 parts, foaming regulator: 4 parts, the above-mentioned mixture of PVC plastic, wood flour and various additives is mixed evenly by a mixer and directly added to the screw extruder , Extruded at 160°C.

[0018] The zinc-calcium composite stabilizers described in the embodiments of the present invention are all zinc-calcium composite stabilizers P790 produced and sold by Shanghai Boao Electronics Co., Ltd., and the compound foaming agents are all compound foams produced and sold by Shanghai Boao Electronics Co. Matching foaming agent FA18, the composite lubricant is the composite lubricant P90 produced and sold by Shanghai Boao Electronics Co., Ltd., and the foaming regulator is the foam...

Embodiment 2

[0020] Take 100 parts of polyvinyl chloride, 25 parts each of sawdust and cotton stalk powder, 20 parts of active light calcium, the active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 6 parts, compound foaming agent: 3 parts, lubricant OPE wax: 1.5 parts, composite lubricant: 0.8 parts, foam regulator: 8 parts, mix the mixture of PVC plastic, sawdust, cotton stalk powder and various additives through a mixer and add directly Put it into a screw extruder and extrude it at 165°C.

Embodiment 3

[0022] Take 100 parts of polyvinyl chloride, 30 parts of cotton stalk powder, 10 parts of rice bran, 10 parts of active light calcium, the active light calcium is light calcium carbonate, zinc-calcium composite stabilizer: 5 parts, compound foaming agent : 2 parts, lubricant OPE wax: 1 part, composite lubricant: 1 part, foam regulator: 3 parts, mix the above material mixture through a mixer and directly add it to the screw extruder, at 160~170 ℃ extruded hair can be.