TWI716911B - Thermoplastic polyurethane composition and method for preparing golf ball containing the thermoplastic polyurethane composition - Google Patents

Abstract

A thermoplastic polyurethane composition and a method for preparing a golf ball containing the thermoplastic polyurethane composition. The thermoplastic polyurethane composition contains fiber materials. The thermoplastic polyurethane composition is used to make a golf ball shell so that the fibers can pass through Substances to improve the cutting resistance of the surface of the spherical shell, so that post-treatment processes such as soaking in isocyanate solution are not required, which can prevent toxic substances from causing harm to operators, and can also prevent toxic substances from being discharged out and causing impact on the environment, achieving environmentally friendly manufacturing The effect.

Description

Thermoplastic polyurethane composition, and Gore containing thermoplastic polyurethane composition How to prepare the ball

The present invention relates to a composition and a method for preparing a golf ball containing the composition, in particular to a thermoplastic polyurethane composition, and a method for preparing a golf ball containing the thermoplastic polyurethane composition.

A general golf ball consists of a core, an intermediate layer covering the core, and a shell covering the intermediate layer. Common high-end golf balls use thermosetting polyurethane elastomer as the main shell However, the spherical shell made of thermosetting polyurethane elastomer has the problem that the process time is long and the used materials cannot be recycled and become waste.

In response to the recent increasing awareness of environmental protection, many manufacturers have changed to use thermoplastic polyurethane elastomers to make golf balls so that the golf balls can be recycled after being discarded. However, golf ball shells made of thermoplastic polyurethane elastomers still In order to overcome the shortcomings of poor cutting resistance on the surface, the conventional technology will immerse the spherical shell in an isocyanate solution for 3 to 5 minutes in the subsequent process of the spherical shell to take the picture. Dry the surface at 60 to 70°C for 2 to 4 hours, and then coat the surface of the thermoplastic polyurethane elastomer spherical shell with isocyanate to enhance the strength and toughness of the spherical shell surface, thereby improving the resistance of the spherical shell surface Machinability. However, isocyanates are highly toxic and easily damage the skin and respiratory system of workers during the manufacturing process. If they are accidentally dispersed or discharged to the outside world, they can also cause air pollution, which greatly compromises the original intention of environmentally friendly manufacturing.

Therefore, the purpose of the present invention is to provide a thermoplastic polyurethane composition that can be used as a golf ball shell material and has good cutting resistance.

Therefore, the thermoplastic polyurethane composition of the present invention contains 10 to 60 wt% of the first elastomer, 30 to 65 wt% of the second elastomer, and 6 to 50 wt% of the third elastomer. The first elastomer is composed of 90 to 95 wt%. % Of the main material and 5~10wt% of additives. The main material is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The additives are plural fiber substances. The second elastomer is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The third elastomer is composed of 85~98wt% of the main substrate and 2~15wt% of additives. The substrate is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates, and the additive is a mixture of titanium dioxide, an antioxidant, and an anti-yellowing agent.

Another object of the present invention is to provide a method for preparing a golf ball containing the aforementioned thermoplastic polyurethane composition.

Therefore, the method for preparing the golf ball of the present invention includes a hot press molding Steps, a first injection molding step, a mixing step, and a second injection molding step. In the hot-press forming step, a hot-press forming machine is used to heat-press the rubber into a spherical center. In the first injection molding step, an injection molding machine is used to mold an intermediate layer covering the center of the sphere. In the mixing step, 90~95wt% of the main material and 5~10wt% of the additives are pelletized. The main material is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The additive is a plurality of fibrous substances, thereby granulating to form a first elastomer, preparing a second elastomer, the second elastomer is selected from polyester, polyether, or polycarbonate Thermoplastic polyurethane elastomer, then 85~98wt% of the main substrate and 2~15wt% of additives are pelletized. The main substrate is a thermoplastic polyurethane elastomer selected from polyester, polyether, or polycarbonate The additive is made by mixing titanium dioxide, antioxidants, and anti-yellowing agents, thereby granulating to form a third elastomer, and then 10~60wt% of the first elastomer and 30~65wt% of the second elastomer , And 6-50wt% of the third elastomer is mixed into a thermoplastic polyurethane composition. In the second injection molding step, the thermoplastic polyurethane composition is shot out of the middle layer and covered with the middle layer to form a ball shell, and a golf ball is produced.

The effect of the present invention is that the thermoplastic polyurethane composition still has the advantages of environmental protection, and by adding the fiber materials, the cutting resistance of the spherical shell surface can be improved, without the need for post-treatment processes such as soaking in isocyanate solution. It can prevent toxic substances from causing harm to workers, and it can also prevent toxic substances from being discharged to the environment. Impact, achieve the effect of environmentally friendly manufacturing.

1: Golf

11: Ball center

12: Middle layer

13: spherical shell

21: Hot press forming steps

22: The first injection molding step

23: Mixing step

24: The second injection molding step

3: Horizontal injection machine

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a flowchart illustrating an embodiment of the method for preparing a golf ball containing a thermoplastic polyurethane composition of the present invention; And Fig. 2 is a schematic diagram illustrating the golf ball made in this embodiment.

1 and 2, an embodiment of the method for preparing a golf ball 1 containing a thermoplastic polyurethane composition of the present invention includes a thermocompression molding step 21, a first injection molding step 22, a mixing step 23, and a The second injection molding step 24. In the hot-press forming step 21, a hot-press forming machine is used to heat-press the rubber into a spherical core 11. In the first injection molding step 22, an injection molding machine is used to mold an intermediate layer 12 covering the core 11 on the core 11 with ionized resin.

In the mixing step 23, 90~95wt% of the main material and 5~10wt% of the additives are pelletized to form a first elastomer, the diameter of which is 0.07 to 0.15 inches Inch, and Shore A hardness is 90~95. Wherein, the main material is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates, and the additive is a plurality of fiber substances. In this embodiment, the fiber substances The substance can be short glass fiber, each fiber-like substance has a length of 1.00 to 3.00 mm and a diameter of 10 microns. A second elastomer is prepared. The second elastomer is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates, with a Shore hardness of 85-95. Then 85~98wt% of the main substrate and 2~15wt% of the additives are pelletized to form a third elastomer. The diameter of the third elastomer is 0.07 to 0.15 inches and the Shore hardness is 85~95. The main substrate is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates, and the additive is a mixture of titanium dioxide, antioxidants, and anti-yellowing agents. Then, 10-60 wt% of the first elastomer, 30-65 wt% of the second elastomer, and 6-50 wt% of the third elastomer are mixed into a thermoplastic polyurethane composition.

In the second injection molding step 24, a horizontal injection machine 3 is first heated at a temperature of 230 to 240 degrees Celsius, and then the thermoplastic polyurethane composition is injected at a temperature of 30 to 40 degrees Celsius. A ball shell 13 covering the intermediate layer 12 and having a thickness of 0.0311 to 0.0345 inches is formed on the intermediate layer 12, so that a golf ball 1 is produced, and finally the golf ball 1 is taken out in a vertical mold opening manner to complete the preparation method.

In summary, because the fiber material is mixed in the ball shell 13 of the golf ball 1, the strength and toughness of the surface of the ball shell 13 can be improved, and the effect of improving the cutting resistance can be achieved, and the preparation method does not require Improve the cutting resistance by immersing in isocyanate solution, which can prevent toxic substances from harming operators and prevent toxic substances from being discharged to the outside world It causes pollution and achieves the effect of environmentally friendly manufacturing, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

21: Hot press forming steps

22: The first injection molding step

23: Mixing step

24: The second injection molding step

Claims (5)

A thermoplastic polyurethane composition comprising: 10~60wt% of a first elastomer, 30~65wt% of a second elastomer, and 6~50wt% of a third elastomer, the first elastomer is composed of 90~95wt% The main material is composed of a main material and 5~10wt% of additives. The main material is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The additives are plural fiber substances. The second elastic The body is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The third elastomer is composed of 85~98wt% of the main substrate and 2~15wt% of additives. The main substrate It is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The additive is a mixture of titanium dioxide, an antioxidant, and an anti-yellowing agent. The first elastomer has a Shore hardness of 90 ~95, the Shore hardness of the second elastomer is 85-95, and the Shore hardness of the third elastomer is 85-95. The thermoplastic polyurethane composition according to claim 1, wherein each fiber material of the additive has a length of 1.00 to 3.00 mm and a diameter of 10 microns. A method for preparing a golf ball containing a thermoplastic polyurethane composition includes: a hot press molding step, using a hot press molding machine to hot press rubber into a core; a first injection molding step, using an injection molding machine An intermediate layer covering the core is formed on the core; a mixing step is to mix 90~95wt% of the main material and 5~10wt% of the The additive is pelletized. The main material is a thermoplastic polyurethane elastomer selected from polyester, polyether, or polycarbonate, and the additive is a plurality of fiber-based substances, thereby granulating to form a first elastomer, Prepare a second elastomer, the second elastomer is selected from polyester, polyether, or polycarbonate thermoplastic polyurethane elastomer, and then 85~98wt% of the main substrate and 2~15wt% The additive is pelletized. The main substrate is a thermoplastic polyurethane elastomer selected from polyesters, polyethers, or polycarbonates. The additive is mixed with titanium dioxide, antioxidants, and anti-yellowing agents to produce The pellets form a third elastomer, and then 10~60wt% of the first elastomer, 30~65wt% of the second elastomer, and 6~50wt% of the third elastomer are mixed into a thermoplastic polyurethane composition, The diameters of the first elastomer and the third elastomer are 0.07 to 0.15 inches; and a second injection molding step in which the thermoplastic polyurethane composition is shot out of the intermediate layer and covered with the intermediate layer to form a Ball shell, and made a golf ball. The method for producing a golf ball containing a thermoplastic polyurethane composition according to claim 3, wherein, in the second injection step, a horizontal injection machine is first heated at a temperature of 230 to 240 degrees Celsius, and then the The thermoplastic polyurethane composition is injected at a temperature of 30 to 40 degrees Celsius to produce the golf ball, and finally the golf ball is taken out in a vertical mold opening manner. The method for preparing a golf ball containing a thermoplastic polyurethane composition according to claim 3, wherein, in the second injection molding step, the thickness of the ball shell is 0.0311 to 0.0345 inches.

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