Hollow crafts based on light-cured unsaturated polyester resin and preparation method thereof

Abstract

The present invention belongs to the technical field of polymer material products and their manufacturing methods, and particularly relates to a hollow handicraft based on a light-curing unsaturated polyester resin and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: firstly, the unsaturated polyester resin, a photoinitiator and ore powder are uniformly mixed to obtain a light-curing resin slurry, and then the light-curing resin slurry is poured into a translucent silicone mold, and ultraviolet light is irradiated to cause the surface of the slurry to solidify, thereby forming a structure in which a solid surrounds a liquid. The present invention has the following advantages: hollow handicrafts are made by using light-curing unsaturated polyester resin, which enriches the manufacturing methods of hollow handicrafts, reduces labor costs, improves production efficiency, and is suitable for mechanized automatic assembly lines, and has extremely high economic value; the hollow handicrafts obtained are beautiful in appearance, clear, and easy to carry.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer material products and manufacturing methods thereof, and particularly relates to a hollow handicraft based on light-cured unsaturated polyester resin and a manufacturing method thereof. Background Art

[0002] Resin crafts refer to products that are made by manually processing resin raw materials into products with artistic value. Unsaturated polyester resin is used as the main raw material. After being fully mixed with fillers, accelerators, curing agents, etc., crafts of various shapes are produced through processes such as molding, pouring, and demoulding. In order to save materials and to prevent the products from being too bulky, a large part of resin crafts are made into hollow structures. In the production process of hollow crafts in the prior art, it is necessary to repeatedly rotate the mold clockwise and counterclockwise to enable the unsaturated polyester resin to be evenly coated on the mold surface and solidified at the same time, thereby obtaining a hollow product with a consistent shell thickness. This production process is complicated and consumes a lot of manpower. Developing a simpler and more efficient production method is an urgent problem to be solved in the hollow craft manufacturing industry.

[0003] On the other hand, UV curing uses medium and short wave radiation of ultraviolet light to promote the polymerization and crosslinking of liquid photocurable resin materials into solid materials with certain mechanical strength. The free radical photoinitiator is introduced into the unsaturated polyester resin system, and the obtained photocurable unsaturated polyester resin has the advantages of low price and wide applicability, and has been widely used in the fields of coatings, inks, crosslinking agents, etc.; because the ultraviolet rays are absorbed by the photoinitiator and gradually decay, the thickness of the UV-cured products is limited to a certain extent, generally 0.1 to 2 cm, and the resin material that is not irradiated by the ultraviolet rays due to the intensity decay still maintains the initial liquid state, but the application of UV curing in the preparation of resin crafts has not yet been related to the application and preparation method, so the present invention uses this characteristic of ultraviolet radiation to apply the photocurable unsaturated polyester resin to the production of hollow crafts. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to overcome the defects in the above-mentioned prior art, the purpose of the present invention is to provide a hollow handicraft based on light-cured unsaturated polyester resin and a method for preparing the same; the method improves the production efficiency of the hollow handicraft, reduces the intensity of manual operation, and the obtained hollow handicraft has a beautiful and clear appearance and is easy to carry.

[0006] (II) Technical solution

[0007] The present invention is implemented by the following technical scheme: The present invention proposes a method for preparing a hollow handicraft based on a light-cured unsaturated polyester resin, and the method comprises the following steps: firstly, the unsaturated polyester resin, a photoinitiator and ore powder are uniformly mixed to obtain a light-cured resin slurry, and then the light-cured resin slurry is poured into a semi-transparent silicone mold, and ultraviolet light is irradiated to cause the surface of the slurry to solidify, thereby forming a structure in which a solid surrounds a liquid, secondly, the mold is opened to take out the structure, and finally a hole is opened on the surface of the structure to allow the liquid light-cured resin slurry inside to flow out and be drained to obtain a rough blank of the hollow handicraft, and the hollow handicraft product is obtained by polishing it to be smooth;

[0008] The raw material composition for preparing the photocurable resin slurry is: 100 parts of unsaturated polyester resin, 1 to 5 parts of photoinitiator, and 10 to 300 parts of ore powder.

[0009] Furthermore, the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 1-hydroxycyclohexyl benzophenone, benzoin diethyl ether, and 4-benzoyl-4-methyldiphenyl sulfide.

[0010] Furthermore, the mineral powder is one or more of gypsum powder, aluminum powder, talcum powder, and calcium powder.

[0011] Furthermore, the light source of the ultraviolet light irradiation is a mercury lamp or a halogen lamp, and the irradiation time is 1 to 10 minutes.

[0012] Furthermore, the opening size of the structure has a diameter of 3 to 30 mm.

[0013] Furthermore, the liquid light-curable resin slurry flowing out after the holes are opened on the structure can be recycled and reused to make hollow handicrafts.

[0014] In addition, the present invention also provides a hollow handicraft made by the above method.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, the technical means of ultraviolet light curing unsaturated polyester resin is adopted to conveniently and efficiently prepare hollow handicrafts, which improves production efficiency, reduces labor costs, is suitable for mechanized automatic assembly lines, and has extremely high economic value. The hollow handicrafts provided by the present invention have beautiful and clear appearance and are easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0020] In this technical solution:

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Embodiment 1

[0023] A hollow handicraft based on light-cured unsaturated polyester resin, the preparation steps of which are:

[0024] 1. 100 g of unsaturated polyester resin, 1 g of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 10 g of calcium powder were stirred and mixed to obtain a photocurable resin slurry.

[0025] 2. Pour the photocurable resin slurry into a translucent silicone mold, irradiate it with a mercury lamp for 1 minute, and then open the mold to obtain a "solid-in-liquid" structure.

[0026] 3. Select a suitable position on the surface of the "solid-in-liquid" structure to make a hole with a diameter of 3mm. Let it stand to allow the liquid light-curing resin slurry inside to flow out. After draining, a hollow handicraft rough embryo is obtained. After polishing it smooth, the hollow handicraft product is obtained.

[0027] Embodiment 2

[0028] A hollow handicraft based on light-cured unsaturated polyester resin, the preparation steps of which are:

[0029] 1. 100 g of unsaturated polyester resin, 1 g of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2 g of 4-benzoyl-4-methyldiphenyl sulfide, 1 g of 1-hydroxycyclohexyl benzophenone, 1 g of benzoin diethyl ether, 100 g of gypsum powder, and 200 g of aluminum powder were stirred and mixed to obtain a photocurable resin slurry.

[0030] 2. Pour the light-curing resin slurry into a translucent silicone mold, irradiate it with a halogen lamp for 10 minutes, and then open the mold to obtain a "solid-in-liquid" structure.

[0031] 3. Select a suitable position on the surface of the "solid-in-liquid" structure to make a hole with a diameter of 30 mm. Let it stand to allow the liquid light-curing resin slurry inside to flow out. After draining, a hollow handicraft rough embryo is obtained. After polishing it smooth, the hollow handicraft product is obtained.

[0032] Embodiment 3

[0033] A hollow handicraft based on light-cured unsaturated polyester resin, the preparation steps of which are:

[0034] 1. 100 g of unsaturated polyester resin, 2 g of 2,4,6-trimethylbenzoyldiphenylphosphine oxide and 100 g of talcum powder were stirred and mixed to obtain a photocurable resin slurry.

[0035] 2. Pour the photocurable resin slurry into the translucent silicone mold, irradiate it with a mercury lamp for 5 minutes, and then open the mold to obtain a "solid-in-liquid" structure.

[0036] 3. Select a suitable position on the surface of the "solid-in-liquid" structure to make a hole with a diameter of 10 mm. Let it stand to allow the liquid light-curing resin slurry inside to flow out. After draining, a hollow handicraft rough embryo is obtained. After polishing it smooth, the hollow handicraft product is obtained.

[0037] In the present invention, the technical means of ultraviolet light curing unsaturated polyester resin is adopted to conveniently and efficiently prepare hollow handicrafts, which improves production efficiency, reduces labor costs, is suitable for mechanized automatic assembly lines, and has extremely high economic value. The hollow handicrafts provided by the present invention have beautiful and clear appearance and are easy to carry.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a hollow handicraft based on a light-curable unsaturated polyester resin, characterized in that: The preparation method comprises the following steps: firstly, unsaturated polyester resin, photoinitiator and ore powder are uniformly mixed to obtain light-curable resin slurry, then the light-curable resin slurry is poured into a semi-transparent silicone mold, and ultraviolet light is irradiated to cause the surface of the slurry to solidify, thereby forming a structure in which a solid surrounds a liquid, secondly, the mold is opened to take out the structure, and finally a hole is opened on the surface to allow the liquid light-curable resin slurry inside to flow out and be drained to obtain a hollow handicraft rough embryo, and the hollow handicraft product is obtained by polishing it to be smooth; The raw material composition for preparing the photocurable resin slurry is: 100 parts of unsaturated polyester resin, 1-5 parts of photoinitiator, and 10-300 parts of ore powder; the opening size diameter of the structure is 3-30 mm.

2. The method for preparing a hollow handicraft based on a light-curable unsaturated polyester resin according to claim 1, characterized in that: The photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl-1-propanone, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 1-hydroxycyclohexyl benzophenone, benzoin diethyl ether, and 4-benzoyl-4-methyldiphenyl sulfide.

3. The method for preparing a hollow handicraft based on a light-curable unsaturated polyester resin according to claim 1, characterized in that: The mineral powder is one or more of gypsum powder, aluminum powder, talcum powder and calcium powder.

4. The method for preparing a hollow handicraft based on a light-curable unsaturated polyester resin according to claim 1, characterized in that: The light source of the ultraviolet light irradiation is one of a mercury lamp and a halogen lamp, and the irradiation time is 1 to 10 minutes.

5. The method for preparing a hollow handicraft based on a light-curable unsaturated polyester resin according to claim 1, characterized in that: The liquid light-curing resin slurry flowing out after the holes are opened on the structure is recycled to make hollow handicrafts.

6. A hollow handicraft made by the method according to any one of claims 1 to 5.

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