阅读说明：本技术 一种ps扩散板及其制备方法 (PS diffusion plate and preparation method thereof ) 是由 吴恺 于 2019-12-02 设计创作，主要内容包括：本发明属于扩散板领域,公开了一种PS扩散板,包括以下质量的物料：PS粒子：100kg；助剂：0.5-1.5kg；机硅微粉：0.5-1.5kg；成核剂：10kg,优选的,所述助剂为偶联剂、光稳定剂、抗氧剂中的混合物,优选的,所述成核剂为山梨醇。本方案加入的有机硅微粉和成核剂山梨醇后,有效的改变了扩散板的内部结构,大大提高了物理性能,降低了产品的热膨胀率,同时不影响产品的光学性能,且本方案的制备工艺简单,制造成本低,本方案的PS扩散板可以广泛应用于电视机的扩散板,具有耐热性、尺寸稳定性、机械强度、耐燃性等良好性能,并有高度光线透过率,优良的遮蔽性及耐久性,使其光线扩散效果达到最佳状态,最适合直下式背光源单元。(The invention belongs to the field of diffusion plates, and discloses a PS diffusion plate which comprises the following materials in parts by mass: PS particles: 100 kg; auxiliary agent: 0.5-1.5 kg; and (3) mechanically grinding the silicon powder: 0.5-1.5 kg; nucleating agent: 10kg, preferably, the auxiliary agent is a mixture of a coupling agent, a light stabilizer and an antioxidant, and preferably, the nucleating agent is sorbitol. After organosilicon miropowder and nucleating agent sorbitol that this scheme added, the effectual inner structure who changes the diffuser plate has improved physical properties greatly, the thermal expansion rate of product has been reduced, do not influence the optical property of product simultaneously, and the preparation simple process of this scheme, low in manufacturing cost, the PS diffuser plate of this scheme can be widely used in the diffuser plate of TV set, good performance such as heat resistance, dimensional stability, mechanical strength, fire resistance, and have high light transmittance, good shielding nature and durability, make its light diffusion effect reach the optimum, the most suitable straight following formula backlight unit.)

1. A PS diffuser plate, its characterized in that: the material comprises the following materials by mass: PS particles: 100 kg; auxiliary agent: 0.5-1.5 kg; and (3) mechanically grinding the silicon powder: 0.5-1.5 kg; nucleating agent: 10 kg.

2. A PS diffuser plate according to claim 1, wherein: the auxiliary agent is a mixture of a coupling agent, a light stabilizer and an antioxidant.

3. A PS diffuser plate according to claim 1, wherein: the nucleating agent is sorbitol, and the sorbitol is any one or combination of more of dibenzylidene sorbitol, p-methylbenzylidene sorbitol, 3, 4-dimethyl dibenzylidene sorbitol and higher fatty acid coated dibenzylidene sorbitol.

4. A preparation method of a PS diffusion plate is characterized by comprising the following steps: the method comprises the following steps:

s1, mixing the raw materials: mixing the PS particles, the auxiliary agent, the organic silicon micro powder and the nucleating agent, pouring the mixture into a large-scale stirrer for stirring for 10 to 15 minutes, and uniformly mixing to obtain raw material particles;

s2, performing extrusion molding, namely putting the raw materials uniformly mixed in the step S1 into an extruding machine, and performing extrusion molding through the extruding machine to form a base plate;

s3, cutting: stress is eliminated on the base plate extruded in the step S2, and the base plate is cut according to requirements;

s4, molding; ventilating and cooling the cut plate in the step S3 to 4-6 hours, and then forming;

s5, cleaning: cleaning the molded PS diffusion plate with clear water;

s6, packaging: and conveying the cleaned PS diffusion plates to an induction position automatic plate stacking machine by a rolling platform for automatic stacking, and then packaging and delivering the PS diffusion plates out of the warehouse.

5. The method according to claim 4, wherein the step of preparing the PS diffuser plate comprises: the extrusion temperature of the extruder is 170-220 ℃.

Technical Field

The invention relates to the field of diffusion plates, in particular to a PS diffusion plate and a preparation method thereof.

Background

The PS diffusion plate is a material with light diffusion property in the category of PS (polystyrene) plate, is one of the categories of diffusion plates made of materials such as acrylic (PMMA), PC, PP, PS, etc., and has optical characteristics of plastic plates with certain haze, light transmittance, refractive index, etc.

The television diffusion plate with the highest utilization rate in the market is made of PS (polystyrene), the PS is brittle and has high thermal expansion rate, the requirement on the thermal expansion rate of the diffusion plate is higher and higher along with the improvement of television technology, and the common PS diffusion plate cannot meet the requirements of people, so that the PS diffusion plate and the preparation method thereof are provided.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a PS diffusion plate and a preparation method thereof, which have the advantage of low thermal expansion rate and solve the problem of high thermal expansion rate of the PS diffusion plate in the prior art.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A PS diffusion plate comprises the following materials by mass: PS particles: 100 kg; auxiliary agent: 0.5-1.5 kg; and (3) mechanically grinding the silicon powder: 0.5-1.5 kg; nucleating agent: 10 kg.

Preferably, the auxiliary agent is a mixture of a coupling agent, a light stabilizer and an antioxidant.

Preferably, the nucleating agent is sorbitol, and the sorbitol is any one or combination of more of dibenzylidene sorbitol, p-methylbenzylidene sorbitol, 3, 4-dimethyl dibenzylidene sorbitol and higher fatty acid coated dibenzylidene sorbitol.

A preparation method of a PS diffusion plate comprises the following steps:

s1, mixing the raw materials: mixing the PS particles, the auxiliary agent, the organic silicon micro powder and the nucleating agent, pouring the mixture into a large-scale stirrer for stirring for 10 to 15 minutes, and uniformly mixing to obtain raw material particles;

s2, performing extrusion molding, namely putting the raw materials uniformly mixed in the step S1 into an extruding machine, and performing extrusion molding through the extruding machine to form a base plate;

s3, cutting: stress is eliminated on the base plate extruded in the step S2, and the base plate is cut according to requirements;

s4, molding; ventilating and cooling the cut plate in the step S3 to 4-6 hours, and then forming;

s5, cleaning: cleaning the molded PS diffusion plate with clear water;

s6, packaging: and conveying the cleaned PS diffusion plates to an induction position automatic plate stacking machine by a rolling platform for automatic stacking, and then packaging and delivering the PS diffusion plates out of the warehouse.

Preferably, the extruder extrusion temperature is 170-220 ℃.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) after the organic silicon micro powder and the sorbitol serving as the nucleating agent are added, the internal structure of the diffusion plate is effectively changed, the physical performance is greatly improved, the thermal expansion rate of the product is reduced, and meanwhile, the optical performance of the product is not influenced.

(2) The PS diffusion plate can be widely applied to the diffusion plate of a television, has good performances such as heat resistance, dimensional stability, mechanical strength, flame resistance and the like, has high light transmittance and excellent shielding property and durability, enables the light diffusion effect to reach the best state, and is most suitable for a direct type backlight unit.

(3) The sorbitol improves the dispersibility and compatibility of the whole diffusion plate, forms a uniform system, reduces the secondary crystallization phenomenon, thereby reducing the shrinkage and thermal expansion of the diffusion plate, and keeps higher haze and better light transmittance.

Drawings

FIG. 1 is a schematic diagram of the operation of a diffuser plate according to the present invention;

FIG. 2 is a schematic diagram of a conventional diffuser plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, a PS diffuser plate includes the following materials by mass: PS particles: 100 kg; auxiliary agent: 0.5-1.5 kg; and (3) mechanically grinding the silicon powder: 0.5-1.5 kg; nucleating agent: 10 kg.

Furthermore, the auxiliary agent is a mixture of a coupling agent, a light stabilizer and an antioxidant.

Further, the nucleating agent is sorbitol, and the sorbitol is any one or combination of more of dibenzylidene sorbitol, p-methylbenzylidene sorbitol, 3, 4-dimethyl dibenzylidene sorbitol and higher fatty acid coated dibenzylidene sorbitol.

A preparation method of a PS diffusion plate comprises the following steps:

s1, mixing the raw materials: mixing the PS particles, the auxiliary agent, the organic silicon micro powder and the nucleating agent, pouring the mixture into a large-scale stirrer for stirring for 10 to 15 minutes, and uniformly mixing to obtain raw material particles;

s2, performing extrusion molding, namely putting the raw materials uniformly mixed in the step S1 into an extruding machine, and performing extrusion molding through the extruding machine to form a base plate;

s3, cutting: stress is eliminated on the base plate extruded in the step S2, and the base plate is cut according to requirements;

s4, molding; ventilating and cooling the cut plate in the step S3 to 4-6 hours, and then forming;

s5, cleaning: cleaning the molded PS diffusion plate with clear water;

s6, packaging: and conveying the cleaned PS diffusion plates to an induction position automatic plate stacking machine by a rolling platform for automatic stacking, and then packaging and delivering the PS diffusion plates out of the warehouse.

Further, the extrusion temperature of the extruder is 170-220 ℃.

In summary, the following steps: after the organic silicon micro powder and the nucleating agent are added, the internal structure of the PS diffusion plate is effectively changed, the physical properties of the products are greatly improved, particularly the thermal expansion rate is greatly reduced, meanwhile, the result of the optical properties under test is not reduced, and the requirements of customers are met.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.