阅读说明：本技术 一种装饰复合板及其生产工艺 (Decorative composite board and production process thereof ) 是由 李广 于 2021-05-22 设计创作，主要内容包括：本发明属于PVC板材加工技术领域,尤其是一种装饰复合板及其生产工艺,针对了PVC板材在加工时其稳定性以及加工性能较差的问题,现提出如下方案,其包括底板层、喷绘涂层以及固化涂层,底板层包括挤出工艺成型的高密度PVC板材实心段和中间段,喷绘涂层粘结于底板层的中间段上表面,固化涂层压制粘结于喷绘涂层的外表面；本发明中通过挤出机对PVC板材进行挤出成型加工处理,有利于提高其口模的分离性,在PVC树脂加工时添加一定比例的热稳定剂、加工改性剂、抗冲击改性剂、润滑剂、填料和光稳定剂,提高了PVC复合板材在加工时的稳定性和加工性能,降低加工机械负荷,使得产品光滑,提高了复合板材的塑化质量,改变了其外观,增加了复合板材的刚性效果。(The invention belongs to the technical field of PVC (polyvinyl chloride) plate processing, in particular to a decorative composite plate and a production process thereof, and aims at the problem that the stability and the processing performance of a PVC plate are poor when the PVC plate is processed, the decorative composite plate comprises a bottom plate layer, a spray painting coating and a cured coating, wherein the bottom plate layer comprises a high-density PVC plate solid section and a middle section which are formed by an extrusion process, the spray painting coating is bonded on the upper surface of the middle section of the bottom plate layer, and the cured coating is pressed and bonded on the outer surface of the spray painting coating; the PVC composite board is subjected to extrusion molding processing by the extruder, so that the separation of a neck mold of the PVC composite board is improved, a certain proportion of heat stabilizer, processing modifier, impact modifier, lubricant, filler and light stabilizer is added during the processing of PVC resin, the stability and the processing performance of the PVC composite board during the processing are improved, the load of processing machinery is reduced, the product is smooth, the plasticizing quality of the composite board is improved, the appearance of the composite board is changed, and the rigidity effect of the composite board is improved.)

1. The utility model provides a decorate composite sheet, includes floor layer (1), air brushing coating (2) and cured coating (3), its characterized in that, floor layer (1) is including the solid section of extrusion technology fashioned high density PVC panel (11) and intermediate segment (12), air brushing coating (2) bond in the intermediate segment (12) upper surface of floor layer (1), cured coating (3) suppression bond in the surface of air brushing coating (2).

2. A process for producing a decorative composite panel comprising the decorative composite panel of claim 1, comprising the steps of:

s1, mixing the following raw materials: PVC resin, a heat stabilizer, a processing modifier, an impact modifier, a lubricant, a filler and a light stabilizer are prepared according to a certain proportion, and are introduced into a high-speed mixer in a certain order to be uniformly mixed to obtain a required mixed raw material;

s2, melt extrusion molding: the raw materials which are proportioned and mixed by the S1 process are put into an extruder, are subjected to melting plasticizing treatment in a screw, are extruded and shaped through a head die, and are cooled, solidified and molded through cooling water to obtain a bottom plate layer (1), and are pulled to a cutting position through a traction device to be subjected to cutting treatment;

s3, spray painting treatment: carrying out surface treatment on the bottom plate layer (1) obtained in the S2 process treatment, spraying clean water on the bottom plate and the back of the inkjet with the torn bottom paper, scraping and pasting the clean water of the coating paper by a scraper, and then pasting the coating on the bottom plate;

s4, cold cutting and trimming: cutting the board subjected to the pasting treatment in the S3 process along the spray-painted edge, and removing burrs on the spray-painted edge until the edge is smooth and tidy;

s5, laminating and drying: carrying out primary drying treatment on the surface of the plate obtained in the S4 process, then carrying out film spraying treatment on the surface of the plate, carrying out coating treatment on the surface of the plate, and then carrying out drying treatment on the plate through a constant-temperature drying chamber;

s6, carrying and packaging: and carrying and packaging the dried composite board after quality identification.

3. The production process of a decorative composite board according to claim 2, wherein the PVC resin raw material in the S2 process is compact PVC-SG4 resin with a particle size of less than 0.1mm, a regular surface, a solid and a ping-pong ball shape.

4. The production process of a decorative composite board according to claim 2, wherein the light shielding agent in the S2 process is preferably titanium dioxide organic pigment for blocking ultraviolet rays from entering the interior of the composite board, preventing the photodegradation of the polymer from proceeding, and increasing the aging resistance of the composite board.

5. The process for producing a decorative composite panel according to claim 2, wherein the raw material feeding sequence of the S2 process is as follows: adding PVC-SG4 resin into a mixing chamber of a high-speed mixer at a low rotating speed, adding a heat stabilizer into PVC-SG4 resin at 60 ℃ and a high rotating speed, heating to 80 ℃, adding a processing modifier, an impact modifier and a lubricant into the high-speed mixer, heating to 110 ℃, adding a filler at the high rotating speed, discharging materials at a low speed of 120 ℃, conveying the materials into a cooling chamber, cooling to 40 ℃, and discharging to obtain dry mixed materials.

6. The production process of the decorative composite board as claimed in claim 2, wherein the surface treatment of the base board layer (1) in the S3 process is a water grinding treatment for removing dirt on the surface of the base board layer (1), and the outer surface of the scraper is wrapped with cloth to avoid damage to the base paper.

7. The production process of the decorative composite board according to claim 2, wherein in the S5 process, the temperature in the constant-temperature drying chamber is lower than 90 ℃, and the drying mode adopts low-temperature slow-speed drying treatment.

8. The process of claim 2, wherein the composite board is packaged in a wrapping manner in the step S6, and the quality test of the composite board includes surface smoothness test of the board.

Technical Field

The invention relates to the technical field of PVC (polyvinyl chloride) plate processing, in particular to a decorative composite plate and a production process thereof.

Background

The polyvinyl chloride (PVC) is yellowish, semitransparent and glossy. The transparency is better than that of polyethylene and polypropylene, is different from that of polystyrene, is divided into soft and hard polyvinyl chloride according to different using amounts of the auxiliary agents, soft products are soft and tough, the hand feeling is sticky, the hardness of hard products is higher than that of low-density polyethylene and lower than that of polypropylene, and the whitening phenomenon can occur at the bending part; the decorative plate is one of important raw materials for interior decoration and home decoration, and the plate in the current decorative material market mainly adopts a PVC plate.

Along with the improvement of human quality of life and the enhancement of environmental protection consciousness, because the thermal stability of PVC panel itself is poor, the processability is poor, in order to guarantee that PVC panel can be long-term being applied to decorate the life of house, need improve the stability and the processability of PVC panel this moment, just can satisfy the user demand of people to PVC panel.

Therefore, a decorative composite board and a production process thereof are needed to solve the problems of poor stability and poor processability of the PVC board during processing.

Disclosure of Invention

The decorative composite board and the production process thereof provided by the invention solve the problems of poor stability and poor processability of a PVC board during processing.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a decorate composite sheet, includes floor layer, air brushing coating and cured coating, the floor layer is including extruding the solid section of technology fashioned high density PVC panel and middle section, the air brushing coating bond in the middle section upper surface of floor layer, cured coating suppression bond in the surface of air brushing coating.

A production process of a decorative composite board comprises the following processes:

s1, mixing the following raw materials: PVC resin, a heat stabilizer, a processing modifier, an impact modifier, a lubricant, a filler and a light stabilizer are prepared according to a certain proportion, and are introduced into a high-speed mixer in a certain order to be uniformly mixed to obtain a required mixed raw material;

s2, melt extrusion molding: the raw materials which are proportioned and mixed by the S1 process are put into an extruder, are subjected to melting plasticizing treatment in a screw, are extruded and shaped through a head die, and are cooled, solidified and molded through cooling water to obtain a bottom plate layer, and the bottom plate layer is pulled to a cutting position through a traction device to be cut;

s3, spray painting treatment: carrying out surface treatment on the bottom plate layer obtained in the S2 process treatment, spraying clean water on the bottom plate layer and the back of the inkjet with the bottom paper torn off, scraping and pasting the clean water of the coating paper through a scraper, and then pasting the coating on the bottom plate;

s4, cold cutting and trimming: cutting the board subjected to the pasting treatment in the S3 process along the spray-painted edge, and removing burrs on the spray-painted edge until the edge is smooth and tidy;

s5, laminating and drying: carrying out primary drying treatment on the surface of the plate obtained in the S4 process, then carrying out film spraying treatment on the surface of the plate, carrying out coating treatment on the surface of the plate, and then carrying out drying treatment on the plate through a constant-temperature drying chamber;

s6, carrying and packaging: and carrying and packaging the dried composite board after quality identification.

Preferably, the PVC resin raw material in the S2 process is compact PVC-SG4 resin with the particle size of less than 0.1mm, regular surface, solid and ping-pong ball shape.

Preferably, the light shielding agent in the S2 process is preferably a titanium dioxide organic pigment for blocking ultraviolet rays from entering the interior of the composite board, preventing the photodegradation of the polymer from proceeding, and increasing the aging resistance of the composite board.

Preferably, the raw material feeding sequence of the S2 process is as follows: adding PVC-SG4 resin into a mixing chamber of a high-speed mixer at a low rotating speed, adding a heat stabilizer into PVC-SG4 resin at 60 ℃ and a high rotating speed, heating to 80 ℃, adding a processing modifier, an impact modifier and a lubricant into the high-speed mixer, heating to 110 ℃, adding a filler at the high rotating speed, discharging materials at a low speed of 120 ℃, conveying the materials into a cooling chamber, cooling to 40 ℃, and discharging to obtain dry mixed materials.

Preferably, the surface treatment mode of the bottom plate layer in the S3 process is water grinding treatment for removing dirt on the surface of the bottom plate layer, and cloth is wrapped on the outer surface of the scraper to avoid damaging the bottom paper.

Preferably, in the S5 process, the temperature in the constant-temperature drying chamber is lower than 90 ℃, and the drying mode adopts low-temperature slow drying treatment.

Preferably, in the S6 process, the composite board is packaged in a coating mode, and the quality identification of the composite board comprises surface smoothness detection of the board.

Compared with the prior art, the invention has the beneficial effects that:

1. the PVC composite board is subjected to extrusion molding processing by the extruder, so that the separation of the neck mold of the PVC composite board is improved, and the heat stabilizer, the processing modifier, the impact modifier, the lubricant, the filler and the light stabilizer are added in a certain proportion during the processing of PVC resin, so that the stability and the processing performance of the PVC composite board during the processing are improved, the load of processing machinery is reduced, the product is smooth, the plasticizing quality of the composite board is improved, the appearance of the composite board is changed, and the rigidity effect of the composite board is improved.

2. The titanium dioxide processing pigment can prevent ultraviolet rays from entering the composite board to prevent the photodegradation of polymers from proceeding, and can improve the aging resistance of the composite board.

Drawings

FIG. 1 is a schematic structural diagram of a decorative composite panel according to the present invention;

fig. 2 is a process flow diagram of a decorative composite board production process provided by the invention.

In the figure: 1. a floor layer; 11. a solid section; 12. a middle section; 2. spray-painting the coating; 3. and curing the coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, the decorative composite board comprises a bottom board layer 1, a spray painting coating layer 2 and a curing coating layer 3, wherein the bottom board layer 1 comprises a high-density PVC board solid section 11 and a middle section 12 which are formed through an extrusion process, the spray painting coating layer 2 is bonded on the upper surface of the middle section 12 of the bottom board layer 1, and the curing coating layer 3 is pressed and bonded on the outer surface of the spray painting coating layer 2.

Referring to fig. 2, a process for producing a decorative composite board comprises the following steps:

s1, mixing the following raw materials: PVC resin, a heat stabilizer, a processing modifier, an impact modifier, a lubricant, a filler and a light stabilizer are prepared according to a certain proportion, and are introduced into a high-speed mixer in a certain order to be uniformly mixed to obtain a required mixed raw material;

specifically, the PVC resin adopts PVC resin with the polymerization degree of 1200-1000, and a heat stabilizer is added to reduce the sensitivity of the PVC resin to heat; the addition of a processing modifier to improve the ductility of the PVC molten product, thereby reducing the possibility of melt fracture; the addition of the impact modifier improves the impact resistance of the plate, the impact modifiers CPE and ACR can be preferably selected, and the addition proportion is preferably 10 parts; the lubricant can reduce the load of processing machinery, so that the composite board is smooth; the filler is added to reduce the production cost of the composite board and increase the performances of the composite board such as conductivity, rigidity and the like; the addition of the light stabilizer can not only prevent ultraviolet rays from entering the composite board to prevent the photodegradation of the polymer from proceeding, but also improve the aging resistance of the composite board.

S2, melt extrusion molding: the raw materials which are proportioned and mixed by the S1 process are put into an extruder, are subjected to melting plasticizing treatment in a screw, are extruded and shaped through a head die, and are cooled, solidified and molded through cooling water to obtain a bottom plate layer 1, and are pulled to a cutting position through a traction device to be subjected to cutting treatment;

s3, spray painting treatment: carrying out surface treatment on the bottom plate layer 1 obtained in the S2 process treatment, spraying clean water on the bottom plate and the back of the inkjet with the bottom paper torn off, scraping and pasting the clean water of the coating paper through a scraper, and then pasting the coating on the bottom plate;

s4, cold cutting and trimming: cutting the board subjected to the pasting treatment in the S3 process along the spray-painted edge, and removing burrs on the spray-painted edge until the edge is smooth and tidy;

s5, laminating and drying: carrying out primary drying treatment on the surface of the plate obtained in the S4 process, then carrying out film spraying treatment on the surface of the plate, carrying out coating treatment on the surface of the plate, and then carrying out drying treatment on the plate through a constant-temperature drying chamber;

s6, carrying and packaging: and carrying and packaging the dried composite board after quality identification.

The PVC resin raw material in the S2 process adopts compact PVC-SG4 resin with the particle size of less than 0.1mm, regular surface, solid and ping-pong ball shape.

The light shielding agent in the S2 process is preferably a titanium dioxide organic pigment used for blocking ultraviolet rays from entering the interior of the composite board, preventing the photodegradation of the polymer from proceeding and increasing the aging resistance of the composite board.

The raw material introduction sequence of the S2 process is as follows: adding PVC-SG4 resin into a mixing chamber of a high-speed mixer at a low rotating speed, adding a heat stabilizer into PVC-SG4 resin at 60 ℃ and a high rotating speed, heating to 80 ℃, adding a processing modifier, an impact modifier and a lubricant into the high-speed mixer, heating to 110 ℃, adding a filler at the high rotating speed, discharging materials at a low speed of 120 ℃, conveying the materials into a cooling chamber, cooling to 40 ℃, and discharging to obtain dry mixed materials.

The surface treatment mode of the bottom plate layer 1 in the S3 process is water grinding treatment for removing dirt on the surface of the bottom plate layer 1, and cloth is wrapped on the outer surface of the scraper blade, so that damage to bottom paper is avoided.

In the S5 process, the temperature in the constant-temperature drying chamber is lower than 90 ℃, and the drying mode adopts low-temperature slow-speed drying treatment.

In the S6 process, the composite board is packaged in a film wrapping mode, and the quality identification of the composite board comprises the surface smoothness detection of the board.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.