阅读说明：本技术 一种复合型pet保护膜的制备方法 (Preparation method of composite PET protective film ) 是由 刘子庆 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种复合型PET保护膜的制备方法,S1：包括PET基层和复合层,PET基层原料按重量份计包括如下组分PET粒子100-150份,端羟基超支化聚酯羟5-10份,丙烯酸酯共聚物3-7份、助剂0.5-2.5份；复合层原料按重量份计包括如下组分液态硅胶5-10份,防火添加剂4-9份,氢氧化镁5-10份、增塑剂10-15份；S2：将S1中的PET基层的原料添加到混合机中进行充分混合搅拌,将混合的溶液通过挤出机挤出,从而能够得到初步PET基层。本方法制备的复合型PET保护膜,PET保护膜设有复合层,能够增加PET保护膜的韧性,且能够增加PET保护膜的防火隔热的性能。(The invention discloses a preparation method of a composite PET protective film, S1: the PET base layer comprises 150 parts of PET particles 100, 5-10 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 3-7 parts of acrylate copolymer and 0.5-2.5 parts of an auxiliary agent by weight; the composite layer comprises, by weight, 5-10 parts of liquid silica gel, 4-9 parts of a fire-retardant additive, 5-10 parts of magnesium hydroxide and 10-15 parts of a plasticizer; s2: the raw materials of the PET base layer in S1 were added to a mixer to be sufficiently mixed and stirred, and the mixed solution was extruded through an extruder, whereby a preliminary PET base layer could be obtained. According to the composite PET protective film prepared by the method, the PET protective film is provided with the composite layer, so that the toughness of the PET protective film can be increased, and the fireproof and heat-insulating performances of the PET protective film can be improved.)

1. The preparation method of the composite PET protective film is characterized by comprising the following steps:

s1: the PET base layer comprises 150 parts of PET particles 100, 5-10 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 3-7 parts of acrylate copolymer and 0.5-2.5 parts of an auxiliary agent by weight; the composite layer comprises the following components, by weight, 5-10 parts of liquid silica gel, 4-9 parts of a fireproof additive, 5-10 parts of magnesium hydroxide and 10-15 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

2. The method as claimed in claim 1, wherein the stirring speed in S2 is 500-1000 r/min.

3. A method for preparing a composite PET protective film according to claim 1, wherein the plasticizer is polyoxyethylene.

4. The method as claimed in claim 1, wherein the stirring speed in S4 is 1000-1500r/min, and the stirring time is 1-3 h.

5. The method for preparing the composite PET protective film according to claim 1, wherein the baking temperature of the PET base layer is 50-90 ℃ and the baking time is 25-45 minutes.

6. The method for preparing a composite PET protective film according to claim 1, wherein the baking temperature of the composite layer is 40-60 ℃ and the baking time is 30-40 minutes.

Technical Field

The invention relates to the technical field of PET (polyethylene terephthalate) protective films, in particular to a preparation method of a composite PET protective film.

Background

With the rapid development of the IT and electronic industries and the development of many new high-tech application fields, the demand for the PET protective film of the electronic product is increasing. However, since the surfaces of the electronic components are very fragile and sensitive, there are very strict requirements on the cleanliness, level of crystalline points, level of viscosity, and temperature resistance of the protective film coated thereon. In the production and use links of a plurality of electronic products, touch screens, liquid crystal screens and the like, in order to avoid possible damage in the processing and carrying processes, PET protective films are required to be used for comprehensive protection, and the pollution of the protective films on attached objects is avoided;

the traditional PET protective film production process is a gluing method. The existing PET protective film is mainly manufactured by adhering a release film layer and a PET original film layer together, namely, after glue is coated on the PET original film, a PET release film layer is attached, and the PET protective film only has basic performance, so that the toughness and the protective performance are poor.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a preparation method of a composite PET protective film.

The invention provides a preparation method of a composite PET protective film, which comprises the following steps:

s1: the PET base layer comprises 150 parts of PET particles 100, 5-10 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 3-7 parts of acrylate copolymer and 0.5-2.5 parts of an auxiliary agent by weight; the composite layer comprises the following components, by weight, 5-10 parts of liquid silica gel, 4-9 parts of a fireproof additive, 5-10 parts of magnesium hydroxide and 10-15 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

Preferably, in the S2, the stirring speed is 500-1000 r/min.

Preferably, the plasticizer is provided as polyoxyethylene.

Preferably, the stirring speed in S4 is 1000-1500r/min, and the stirring time is 1-3 h.

Preferably, the baking temperature of the PET substrate is 50-90 ℃, and the baking time is 25-45 minutes.

Preferably, the baking temperature of the composite layer is 40-60 ℃, and the baking time is 30-40 minutes.

According to the composite PET protective film prepared by the invention, the PET protective film is provided with the composite layer, the liquid silica gel is arranged in the composite layer, so that the toughness of the PET protective film can be increased, and the fireproof and heat-insulating properties of the PET protective film can be increased through the fireproof additive and the magnesium hydroxide.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Example one

The embodiment provides a preparation method of a composite PET protective film, which comprises the following steps:

s1: the PET base layer comprises 150 parts of PET particles, 10 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 7 parts of acrylate copolymer and 2.5 parts of an auxiliary agent by weight; the composite layer comprises the following components, by weight, 5 parts of liquid silica gel, 4 parts of a fireproof additive, 5 parts of magnesium hydroxide and 10 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

In this example, in S2, the stirring speed was 500 r/min.

In this example, the plasticizer was provided as polyoxyethylene.

In this example, the stirring speed in S4 was 1000r/min, and the stirring time was 3 hours.

In this example, the baking temperature of the PET base layer was 50 ℃ and the baking time was 45 minutes.

In this embodiment, the baking temperature of the composite layer is 40 ℃, and the baking time is 40 minutes.

Example two

S1: the PET base layer comprises 110 parts of PET particles, 6 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 4 parts of acrylate copolymer and 1 part of auxiliary agent; the composite layer comprises the following components, by weight, 6 parts of liquid silica gel, 5 parts of a fireproof additive, 6 parts of magnesium hydroxide and 11 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

In this example, in S2, the stirring speed was 600 r/min.

In this example, the plasticizer was provided as polyoxyethylene.

In this example, the stirring speed in S4 was 1100r/min, and the stirring time was 3 hours.

In this example, the baking temperature of the PET base layer was 60 ℃, and the baking time was 40 minutes.

In this embodiment, the baking temperature of the composite layer is 60 ℃, and the baking time is 40 minutes.

EXAMPLE III

S1: the PET base layer comprises 120 parts of PET particles, 7 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 5 parts of acrylate copolymer and 1.5 parts of an auxiliary agent by weight; the composite layer comprises 7 parts of liquid silica gel, 6 parts of fireproof additive, 7 parts of magnesium hydroxide and 12 parts of plasticizer in parts by weight;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

In this example, in S2, the stirring speed was 800 r/min.

In this example, the plasticizer was provided as polyoxyethylene.

In this example, the stirring speed in S4 was 1200r/min, and the stirring time was 2 hours.

In this example, the baking temperature of the PET base layer was 70 ℃, and the baking time was 30 minutes.

In this embodiment, the baking temperature of the composite layer is 50 ℃, and the baking time is 30 minutes.

Example four

The embodiment provides a preparation method of a composite PET protective film, which comprises the following steps:

s1: the PET base layer comprises 130 parts of PET particles, 8 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 6 parts of acrylate copolymer and 1.5 parts of an auxiliary agent by weight; the composite layer comprises the following components, by weight, 9 parts of liquid silica gel, 8 parts of a fireproof additive, 9 parts of magnesium hydroxide and 14 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

In this example, in S2, the stirring speed was 1000 r/min.

In this example, the plasticizer was provided as polyoxyethylene.

In this example, the stirring speed in S4 was 500r/min, and the stirring time was 2 hours.

In this example, the baking temperature of the PET base layer was 90 ℃, and the baking time was 40 minutes.

In this embodiment, the baking temperature of the composite layer is 60 ℃, and the baking time is 35 minutes.

EXAMPLE five

The embodiment provides a preparation method of a composite PET protective film, which comprises the following steps:

s1: the PET base layer comprises 150 parts of PET particles, 10 parts of hydroxyl-terminated hyperbranched polyester hydroxyl, 7 parts of acrylate copolymer and 2.5 parts of an auxiliary agent by weight; the composite layer comprises the following components, by weight, 10 parts of liquid silica gel, 9 parts of a fireproof additive, 10 parts of magnesium hydroxide and 15 parts of a plasticizer;

s2: adding the raw materials of the PET base layer in the S1 into a mixer for fully mixing and stirring, and extruding the mixed solution through an extruder to obtain a primary PET base layer;

s3: preliminarily mixing the raw materials of the composite layer in the S1, and then blending, melting and extruding the composite layer by a multi-screw extruder;

s4: printing a surface on the preliminary PET base layer in S2 to form a printed layer, thereby printing a PET base layer;

s5: respectively placing the printed PET base layer obtained in the step S4 and the composite layer obtained in the step S2 into a dryer for drying;

s6: placing the dried composite layer in S5 above the printed PET base layer, and carrying out UV curing to obtain a PET base layer with the composite layer;

s7: and cooling the composite type protective film in the S6 at room temperature to obtain a finished product of the composite type PET protective film.

In this example, the stirring speed in S2 was 9000 r/min.

In this example, the plasticizer was provided as polyoxyethylene.

In this example, the stirring speed in S4 was 1300r/min, and the stirring time was 1 hour.

In this example, the baking temperature of the PET base layer was 70 ℃, and the baking time was 25 minutes.

In this embodiment, the baking temperature of the composite layer is 50 ℃, and the baking time is 30 minutes.

According to the composite PET protective film prepared by the invention, the PET protective film is provided with the composite layer, the liquid silica gel is arranged in the composite layer, so that the toughness of the PET protective film can be increased, and the fireproof and heat-insulating properties of the PET protective film can be increased through the fireproof additive and the magnesium hydroxide.

The composite PET protective film prepared in the above embodiment is then tested to obtain the data shown in the following table

Test items	Longitudinal breaking elongation (%)	Longitudinal breaking elongation (%)	Fire-retardant Property (%)
				Example one	115	108	75
Example two	119	111	78
				EXAMPLE III	122	114	80
Example four	126	118	85
				EXAMPLE five	120	116	83

The results show that the composite PET protective film prepared by the invention has good toughness and fireproof and heat-insulating properties, and the fourth embodiment is the best embodiment.

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 considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.