阅读说明：本技术 一种丝印油墨及其制备工艺 (Silk-screen printing ink and preparation process thereof ) 是由 张明裕 许坤宗 于 2020-04-20 设计创作，主要内容包括：本发明属于油墨技术领域,具体的说是一种丝印油墨及其制备工艺；包括以下各组分：聚酯树脂、乙二醇丁醚、丙烯酸树脂、颜料、连接料、碳酸钙、添加剂、玻璃微珠和疏水疏油涂料；本发明通过在现有油墨配方的基础上,加入玻璃微珠,含有玻璃微珠的油墨在衣服上丝印后,能够具有较好的反光性能,当车辆而来时,能够对驾驶者有较好的提醒作用,保证人员的安全,并且在玻璃微珠表面覆盖一层疏水疏油涂料,疏水疏油涂料能够对玻璃微珠进行保护,降低玻璃微珠的腐蚀,保证玻璃微珠有较强的反光效果,提高使用后人员的安全性。(The invention belongs to the technical field of printing ink, and particularly relates to a silk-screen printing ink and a preparation process thereof; comprises the following components: polyester resin, ethylene glycol monobutyl ether, acrylic resin, pigment, connecting material, calcium carbonate, additive, glass micro-bead and hydrophobic and oleophobic coating; according to the invention, the glass beads are added on the basis of the existing ink formula, the ink containing the glass beads can have better light reflecting performance after being silkscreened on clothes, when a vehicle comes, a better reminding effect can be realized for a driver, the safety of personnel is ensured, and the surface of the glass beads is covered with a layer of hydrophobic and oleophobic coating which can protect the glass beads, so that the corrosion of the glass beads is reduced, the glass beads are ensured to have stronger light reflecting effect, and the safety of the personnel after use is improved.)

1. The silk-screen printing ink is characterized in that: the composition comprises the following components in parts by weight:

30-40 parts of polyester resin;

20-25 parts of ethylene glycol butyl ether;

10-14 parts of acrylic resin;

15-20 parts of pigment;

4-6 parts of a connecting material;

1-5 parts of calcium carbonate;

2-3 parts of an additive;

10-12 parts of glass beads;

5-6 parts of hydrophobic and oleophobic coating;

wherein the connecting material is a mixture of castor oil, mineral oil, a solvent and water, and the additive is a mixture of a thickening agent, a flatting agent and a dispersing agent; the surface of the glass bead is covered with a layer of hydrophobic and oleophobic coating by pretreatment equipment;

the pretreatment equipment comprises an inner hemispherical surface (1), a support table (2) for supporting the inner hemispherical surface (1) and an outer hemispherical cover (3) sleeved outside the inner hemispherical surface (1), wherein a plurality of circles of depressions (4) are formed in the position, close to the bottom, of the inner hemispherical surface (1), and the gap between the outer hemispherical cover (3) and the inner hemispherical cover is the diameter of the glass microsphere; the top of the inner hemispherical surface (1) is provided with a feed inlet (5); be close to interior hemisphere face (1) bottom edge be provided with annular channel (6) on brace table (2), annular channel (6) department be provided with ring heater (7) in brace table (2), ring heater (7) are located the outer periphery of annular channel (6), position department that outer hemisphere cover (3) surface is close to the bottom has linked firmly a plurality of knee rods (8), and same annular disc (9) has been linked firmly to a plurality of knee rods (8) bottom, corresponds knee rod (8) brace table (2) top has linked firmly gag lever post (10), and gag lever post (8) is run through on gag lever post (10) top.

2. The screen printing ink as claimed in claim 1, wherein: the dispersing agent is stearic acid monoglyceride, polyethylene glycol or oxidized polyethylene wax, and the dispersing agent is a cationic wetting dispersing agent.

3. The screen printing ink as claimed in claim 1, wherein: the addition ratio of the polyester resin, the ethylene glycol monobutyl ether and the acrylic resin is 3:2:1, and the polyester resin, the ethylene glycol monobutyl ether and the acrylic resin need to be initially mixed.

4. A screen printing ink as claimed in claim 3, wherein: a hopper disc (11) is arranged at the top of the annular channel (6), and the hopper disc (11) is fixedly connected to the top of the supporting platform (2) close to the outer edge of the annular channel (6).

5. The screen printing ink of claim 4, wherein: the inclination angle that funnel dish (11) are close to the bottom enlarges gradually, and funnel dish (11) surface has scribbled glass and has glued.

6. A process for preparing a screen printing ink, which is suitable for use in the screen printing ink of any one of claims 1 to 5, characterized in that: the process comprises the following steps:

s1: firstly, glass beads are put in from a feed port (5) at the top of an outer hemispherical cover (3), then, hydrophobic and oleophobic coating is injected into the feed port (5), the hydrophobic and oleophobic coating can be adhered to the glass beads when the glass beads slide down along the outer hemispherical surface (1), and the glass beads roll in a recess (4) when passing through the recess (4), so that the surface of the glass beads is provided with the hydrophobic and oleophobic coating;

s2: glass beads adhered with the hydrophobic and oleophobic coating fall into the annular channel (6), and an annular heater (7) in the annular channel (6) dries the hydrophobic and oleophobic coating on the surfaces of the fallen glass beads to form a hydrophobic and oleophobic coating surface layer on the surfaces of the glass beads;

s3: adding polyester resin and acrylic resin into butyl cellosolve for grinding to form mixed grinding liquid, then adding pigment and connecting material into the grinding liquid, and stirring until the pigment is completely dissolved, wherein the pigment is bright color;

s4: then sequentially adding calcium carbonate and an additive, and stirring the mixture at the normal temperature at the speed of 500-600r/min until the system is uniform;

s5: and finally, adding the glass beads forming the surface layer of the hydrophobic and oleophobic coating into the mixture stirred until the system is uniform, and stirring again at the stirring speed of 3-5 r/min.

Technical Field

The invention belongs to the technical field of printing ink, and particularly relates to screen printing ink and a preparation process thereof.

Background

The silk-screen printing ink refers to all inks used in a silk-screen printing mode, is also called silk-screen printing ink, is generally used in a silk-screen printing mode, is widely applied and can be used for fabric printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery silk-screen printing and the like. The screen printing ink has quite wide application, and the screen printing can be used as printing with a wide application range and can be divided into the following steps according to different printing materials: the method comprises the following steps of textile printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery screen printing, electronic decoration billboard screen printing, metal billboard screen printing, stainless steel product screen printing, light reflector screen printing, screen transfer printing alumite, screen printing picture, lacquerware screen printing and the like, wherein the main evaluation indexes are viscosity, thixotropy, yield, fluidity plasticity, surface tension and fineness.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a silk-screen printing ink and a preparation process thereof, which are used for solving the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the silk-screen printing ink comprises the following components in parts by weight:

30-40 parts of polyester resin;

20-25 parts of ethylene glycol butyl ether;

10-14 parts of acrylic resin;

15-20 parts of pigment;

4-6 parts of a connecting material;

1-5 parts of calcium carbonate;

2-3 parts of an additive;

10-12 parts of glass beads;

5-6 parts of hydrophobic and oleophobic coating;

wherein the connecting material is a mixture of castor oil, mineral oil, a solvent and water, and the additive is a mixture of a thickening agent, a flatting agent and a dispersing agent; the surface of the glass bead is covered with a layer of hydrophobic and oleophobic coating by pretreatment equipment;

because the existing coating does not have a light reflecting function, some road administration workers are easy to be threatened by vehicles when wearing the existing work clothes for printing artistic characters to work in a dark light environment, so that dangers are caused to the workers, the safety of the workers is ensured by measures such as pasting of light reflecting strips and the like, and the complexity is increased, so that the problem mainly solved by the invention is how to realize that the existing silk-screen printing ink has certain light reflecting performance, and the health of the workers is ensured; the glass beads are added on the basis of the existing ink formula, the ink containing the glass beads can have good light reflecting performance after being silkscreened on clothes, when a vehicle comes, a driver can be reminded well, the safety of personnel is guaranteed, a layer of hydrophobic and oleophobic coating is covered on the surfaces of the glass beads, the hydrophobic and oleophobic coating can protect the glass beads, the corrosion of the glass beads is reduced, and the glass beads are guaranteed to have a strong light reflecting effect;

the pretreatment equipment comprises an inner hemispherical surface, a supporting table for supporting the inner hemispherical surface and an outer hemispherical cover sleeved on the outer side of the inner hemispherical surface, wherein a plurality of circles of depressions are arranged at the position, close to the bottom, of the inner hemispherical surface, and the gap between the outer hemispherical cover and the inner hemispherical cover is the diameter of the glass microspheres; the top of the inner hemispherical surface is provided with a feed inlet; an annular channel is arranged on the supporting table close to the edge of the bottom of the inner hemispherical surface, an annular heater is arranged in the supporting table at the annular channel and is positioned on the outer circumferential surface of the annular channel, a plurality of bent rods are fixedly connected to the outer surface of the outer hemispherical cover close to the bottom, the bottoms of the plurality of bent rods are fixedly connected with the same annular disc, limiting rods are fixedly connected to the tops of the supporting tables corresponding to the bent rods, and the top ends of the limiting rods penetrate through the bent rods; because the diameter of the glass beads is smaller, when the surfaces of the glass beads are covered with a layer of hydrophobic and oleophobic coating, the glass beads can be adhered, the hydrophobic and oleophobic coating between the glass beads needs to be separated subsequently, and the production efficiency is influenced, so that the pretreatment equipment disclosed by the invention can mainly realize that when the surfaces of the hydrophobic and oleophobic coating are formed on the surfaces of the glass beads, the glass beads do not need to be separated subsequently, and the production efficiency is improved; the specific measures and the using process are as follows: glass beads are placed from a feed inlet at the top of an outer hemispherical cover, then hydrophobic and oleophobic coating is injected into the feed inlet, the hydrophobic and oleophobic coating covers the surface of an inner hemispherical surface, and the gap between the outer hemispherical cover and the inner hemispherical cover is the diameter of the glass beads, so that the glass beads can only enter one circle along the circumferential direction each time, the hydrophobic and oleophobic coating can be adhered to the glass beads when the glass beads slide down along the outer hemispherical surface, meanwhile, the glass beads can roll at a sunken part when sunken, so that the glass beads roll for a plurality of circles, further, the more uniform hydrophobic and oleophobic coating is arranged on the surface of the glass beads, the glass beads adhered with the hydrophobic and oleophobic coating fall into an annular channel, an annular heater in the annular channel can rapidly dry the hydrophobic and oleophobic coating on the surface of the falling glass beads, the finally dried glass beads cannot be adhered, and the production efficiency is ensured.

Preferably, the dispersant is stearic acid monoglyceride, polyethylene glycol or oxidized polyethylene wax, and the dispersant is cationic wetting dispersant, cationic wetting dispersant is a non-polar compound with positive charge, mainly amine salt, quaternary ammonium salt, pyridinium, etc., the cationic surfactant has strong adsorption capacity, and has good dispersing effect on carbon black, various iron oxides and organic pigments, but the cationic wetting dispersant has chemical reaction with carboxyl in the base material, and the cationic wetting dispersant is not used together with the anionic dispersant.

Preferably, the addition ratio of the polyester resin to the ethylene glycol butyl ether to the acrylic resin is 3:2:1, and the polyester resin, the ethylene glycol butyl ether and the acrylic resin need to be initially mixed; by adding the polyester resin and the acrylic resin into the ethylene glycol butyl ether, the polyester resin and the acrylic resin are dissolved in the ethylene glycol butyl ether, so that the polyester resin and the acrylic resin are conveniently mixed, and then when other components are added, the other components can be more uniformly acted with the polyester resin and the acrylic resin.

Preferably, the top of the annular channel is provided with a funnel disc which is fixedly connected to the top of the support table close to the outer edge of the annular channel; when the glass beads bonded with the hydrophobic and oleophobic coating fall from the gap between the outer hemispherical cover and the inner hemispherical cover, the glass beads firstly fall onto the hopper disc, then fall into the hopper disc from the bottom of the hopper disc, and due to the existence of the hopper disc, the glass beads bonded with more hydrophobic and oleophobic coating can adhere to the redundant hydrophobic and oleophobic coating on the hopper disc, the glass beads bonded with less hydrophobic and oleophobic coating can adhere to the redundant hydrophobic and oleophobic coating on the hopper disc, and the uniformity of the hydrophobic and oleophobic coating on the surface of the glass beads is further ensured.

Preferably, the inclination angle of the funnel disc close to the bottom end is gradually increased, and glass cement is coated on the surface of the funnel disc; the inclination that the funnel dish is close to the bottom grow gradually, when can making glass bead along the whereabouts of funnel dish, faster break away from funnel dish surface, funnel dish surface paint glass glue back simultaneously, glass glue has certain elasticity, can play certain cushioning effect to the glass bead that drops on the funnel dish, the hydrophobic oleophobic coating that prevents glass bead surface receives stronger impact and breaks away from, and during the ring heater heating, can make glass glue have certain compliance, further guaranteed the buffering to glass bead.

A preparation process of screen printing ink comprises the following steps:

s1: firstly, putting glass beads into a feed inlet at the top of an outer hemispherical cover, then injecting a hydrophobic and oleophobic coating into the feed inlet, wherein the hydrophobic and oleophobic coating can be adhered to the glass beads when the glass beads slide down along the outer hemispherical surface 1, and the glass beads roll in a recess when passing through the recess, so that the hydrophobic and oleophobic coating is arranged on the surfaces of the glass beads; firstly, forming a hydrophobic and oleophobic coating surface layer on the surface of the glass beads, and ensuring that the glass beads cannot be corroded when being added into other components subsequently;

s2: the glass beads adhered with the hydrophobic and oleophobic coating drop into the annular channel, and the annular heater in the annular channel dries the hydrophobic and oleophobic coating on the surfaces of the dropped glass beads to form a hydrophobic and oleophobic coating surface layer on the surfaces of the glass beads;

s3: adding polyester resin and acrylic resin into butyl cellosolve for grinding to form mixed grinding liquid, then adding pigment and connecting material into the grinding liquid, and stirring until the pigment is completely dissolved, wherein the pigment is bright color; the pigment is bright, so that the light-reflecting color of the glass beads can be guaranteed to be bright;

s4: then sequentially adding calcium carbonate and an additive, and stirring the mixture at the normal temperature at the speed of 500-600r/min until the system is uniform;

s5: finally, adding the glass beads forming the surface layer of the hydrophobic and oleophobic coating into the mixture stirred until the system is uniform, and stirring again at the stirring speed of 3-5 r/min; the speed is less, and the surface layer of the hydrophobic and oleophobic coating on the surface of the glass bead can not fall off.

The invention has the technical effects and advantages that:

1. according to the invention, the glass beads are added on the basis of the existing ink formula, the ink containing the glass beads can have better light reflecting performance after being silkscreened on clothes, when a vehicle comes, a better reminding effect can be realized for a driver, the safety of personnel is ensured, and the surface of the glass beads is covered with a layer of hydrophobic and oleophobic coating which can protect the glass beads, so that the corrosion of the glass beads is reduced, the glass beads are ensured to have stronger light reflecting effect, and the safety of the personnel after use is improved.

2. According to the invention, glass beads are put from the feed inlet at the top of the outer hemispherical cover, then the gap between the outer hemispherical cover and the inner hemispherical cover filled with the hydrophobic and oleophobic coating is the diameter of the glass beads, so that the glass beads can only enter one circle along the circumferential direction each time, the hydrophobic and oleophobic coating can be adhered when the glass beads slide down along the outer hemispherical surface, meanwhile, the glass beads can roll at the sunken part when being sunken, the glass beads roll for more circles, further the more uniform hydrophobic and oleophobic coating is arranged on the surfaces of the glass beads, the hydrophobic and oleophobic coating on the surfaces of the fallen glass beads is quickly dried by the annular heater in the annular channel, finally, the dried glass beads cannot be adhered, and the production efficiency is ensured.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic perspective view of a pretreatment apparatus used in the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with the outer hemispherical cover removed;

FIG. 3 is a schematic view of the position of the funnel disk and ring heater of the present invention;

FIG. 4 is a bottom view of the inner hemispherical surface and the outer hemispherical cap of the present invention;

FIG. 5 is a flow chart of a manufacturing process of the present invention;

in the figure: the device comprises an inner hemispherical surface 1, a support table 2, an outer hemispherical cover 3, a recess 4, a feed inlet 5, an annular channel 6, an annular heater 7, a bent rod 8, an annular disc 9, a limiting rod 10 and a funnel disc 11.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-5, the silk-screen printing ink comprises the following components in parts by weight:

30-40 parts of polyester resin;

20-25 parts of ethylene glycol butyl ether;

10-14 parts of acrylic resin;

15-20 parts of pigment;

4-6 parts of a connecting material;

1-5 parts of calcium carbonate;

2-3 parts of an additive;

10-12 parts of glass beads;

5-6 parts of hydrophobic and oleophobic coating;

wherein the connecting material is a mixture of castor oil, mineral oil, a solvent and water, and the additive is a mixture of a thickening agent, a flatting agent and a dispersing agent; the surface of the glass bead is covered with a layer of hydrophobic and oleophobic coating by pretreatment equipment;

because the existing coating does not have a light reflecting function, some road administration workers are easy to be threatened by vehicles when wearing the existing work clothes for printing artistic characters to work in a dark light environment, so that dangers are caused to the workers, the safety of the workers is ensured by measures such as pasting of light reflecting strips and the like, and the complexity is increased, so that the problem mainly solved by the invention is how to realize that the existing silk-screen printing ink has certain light reflecting performance, and the health of the workers is ensured; the glass beads are added on the basis of the existing ink formula, the ink containing the glass beads can have good light reflecting performance after being silkscreened on clothes, when a vehicle comes, a driver can be reminded well, the safety of personnel is guaranteed, a layer of hydrophobic and oleophobic coating is covered on the surfaces of the glass beads, the hydrophobic and oleophobic coating can protect the glass beads, the corrosion of the glass beads is reduced, and the glass beads are guaranteed to have a strong light reflecting effect;

the pretreatment equipment comprises an inner hemispherical surface 1, a support table 2 for supporting the inner hemispherical surface 1 and an outer hemispherical cover 3 sleeved outside the inner hemispherical surface 1, wherein a plurality of circles of depressions 4 are arranged at the position, close to the bottom, of the inner hemispherical surface 1, and the gap between the outer hemispherical cover 3 and the inner hemispherical cover is the diameter of glass microspheres; the top of the inner hemispherical surface 1 is provided with a feed inlet 5; an annular channel 6 is arranged on the supporting table 2 close to the bottom edge of the inner hemispherical surface 1, an annular heater 7 is arranged in the supporting table 2 at the position of the annular channel 6, the annular heater 7 is positioned on the outer circumferential surface of the annular channel 6, a plurality of bent rods 8 are fixedly connected to the outer surface of the outer hemispherical cover 3 close to the bottom, the bottoms of the plurality of bent rods 8 are fixedly connected with the same annular disc 9, the top of the supporting table 2 corresponding to the bent rods 8 is fixedly connected with a limiting rod 10, and the top end of the limiting rod 10 penetrates through the bent rods 8; because the diameter of the glass beads is smaller, when the surfaces of the glass beads are covered with a layer of hydrophobic and oleophobic coating, the glass beads can be adhered, the hydrophobic and oleophobic coating between the glass beads needs to be separated subsequently, and the production efficiency is influenced, so that the pretreatment equipment disclosed by the invention can mainly realize that when the surfaces of the hydrophobic and oleophobic coating are formed on the surfaces of the glass beads, the glass beads do not need to be separated subsequently, and the production efficiency is improved; the specific measures and the using process are as follows: glass beads are put in from a feed port 5 at the top of an outer hemispherical cover 3, then hydrophobic and oleophobic coating is injected into the feed port 5, the hydrophobic and oleophobic coating covers the surface of an inner hemispherical surface 1, the gap between the outer hemispherical cover 3 and the inner hemispherical cover is the diameter of the glass beads, therefore, the glass beads can only enter one circle along the circumferential direction each time, and the hydrophobic and oleophobic coating can be adhered when the glass beads slide down along the outer hemispherical surface, meanwhile, when the glass beads pass through the concave 4, the glass beads can roll at the concave 4, so that the glass beads roll for more circles, so that the surfaces of the glass beads are provided with more uniform hydrophobic and oleophobic coatings, the glass beads adhered with the hydrophobic and oleophobic coatings fall into the annular channel 6, the annular heater 7 in the annular channel 6 quickly dries the hydrophobic and oleophobic coating on the surface of the dropped glass beads, and finally the dried glass beads are not adhered, so that the production efficiency is ensured.

The dispersing agent is stearic acid monoglyceride, polyethylene glycol or oxidized polyethylene wax, the dispersing agent is a cationic wetting dispersing agent, the cationic wetting dispersing agent is a non-polar compound with positive charges, and mainly comprises amine salt, quaternary ammonium salt, pyridine salt and the like, the cationic surfactant has strong adsorption force and good dispersing effect on carbon black, various iron oxides and organic pigments, but the cationic wetting dispersing agent and carboxyl groups in a base material have chemical reaction and is not required to be used together with an anionic dispersing agent.

The addition ratio of the polyester resin to the ethylene glycol monobutyl ether to the acrylic resin is 3:2:1, and the polyester resin, the ethylene glycol monobutyl ether and the acrylic resin need to be initially mixed; by adding the polyester resin and the acrylic resin into the ethylene glycol butyl ether, the polyester resin and the acrylic resin are dissolved in the ethylene glycol butyl ether, so that the polyester resin and the acrylic resin are conveniently mixed, and then when other components are added, the other components can be more uniformly acted with the polyester resin and the acrylic resin.

The top of the annular channel 6 is provided with a funnel disc 11, and the funnel disc 11 is fixedly connected to the top of the support platform 2 close to the outer edge of the annular channel 6; when the glass beads bonded with the hydrophobic and oleophobic coating fall from the gap between the outer hemispherical cover 3 and the inner hemispherical cover, the glass beads firstly fall onto the hopper disc 11, then fall into the hopper disc 11 from the bottom of the hopper disc 11, and due to the existence of the hopper disc 11, the glass beads bonded with more hydrophobic and oleophobic coatings can adhere to the redundant hydrophobic and oleophobic coatings on the hopper disc 11, and the glass beads bonded with less hydrophobic and oleophobic coatings can adhere to the redundant hydrophobic and oleophobic coatings on the hopper disc 11, so that the uniformity of the hydrophobic and oleophobic coatings on the surfaces of the glass beads is further ensured.

The inclination angle of the funnel disc 11 close to the bottom end is gradually increased, and glass cement is coated on the surface of the funnel disc 11; inclination that hopper dish 11 is close to the bottom grow gradually, when can making glass bead along hopper dish 11 whereabouts, break away from hopper dish 11 surface faster, 11 surfaces of funnel dish paint glass simultaneously and glue the back, glass glues and has certain elasticity, can play certain cushioning effect to the glass bead that drops on hopper dish 11, prevent that the hydrophobic oleophobic coating on glass bead surface from receiving stronger impact and breaking away from, and during the heating of ring heater 7, can make glass glue have certain compliance, further guaranteed the buffering to the glass bead.

A preparation process of screen printing ink comprises the following steps:

s1: firstly, glass beads are put in from a feed port 5 at the top of an outer hemispherical cover 3, then the hydrophobic and oleophobic coating is injected into the feed port 5, the hydrophobic and oleophobic coating can be adhered to the glass beads when the glass beads slide down along the outer hemispherical surface 1, and meanwhile, the glass beads roll in a recess 4 when passing through the recess 4, so that the hydrophobic and oleophobic coating is arranged on the surfaces of the glass beads; firstly, forming a hydrophobic and oleophobic coating surface layer on the surface of the glass beads, and ensuring that the glass beads cannot be corroded when being added into other components subsequently;

s2: the glass beads adhered with the hydrophobic and oleophobic coating fall into the annular channel 6, and the annular heater 7 in the annular channel 6 dries the hydrophobic and oleophobic coating on the surfaces of the fallen glass beads to form a hydrophobic and oleophobic coating surface layer on the surfaces of the glass beads;

s3: adding polyester resin and acrylic resin into butyl cellosolve for grinding to form mixed grinding liquid, then adding pigment and connecting material into the grinding liquid, and stirring until the pigment is completely dissolved, wherein the pigment is bright color; the pigment is bright, so that the light-reflecting color of the glass beads can be guaranteed to be bright;

s4: then sequentially adding calcium carbonate and an additive, and stirring the mixture at the normal temperature at the speed of 500-600r/min until the system is uniform;

s5: finally, adding the glass beads forming the surface layer of the hydrophobic and oleophobic coating into the mixture stirred until the system is uniform, and stirring again at the stirring speed of 3-5 r/min; the speed is less, and the surface layer of the hydrophobic and oleophobic coating on the surface of the glass bead can not fall off.

When the silk-screen printing ink works, because the existing coating does not have a light reflecting function, some road administration workers are easy to be threatened by vehicles when driving to work in a dark light environment by wearing the existing work clothes for printing artistic words, so that dangers are caused to the workers, the safety of the workers is ensured by measures such as pasting of light reflecting strips and the like, and the complexity is increased, so that the problem mainly solved by the silk-screen printing ink is how to realize that the existing silk-screen printing ink has certain light reflecting performance, and the health of the workers is ensured; the glass beads are added on the basis of the existing ink formula, the ink containing the glass beads can have better light reflecting performance after being silkscreened on clothes, when a vehicle comes, a better reminding effect can be achieved for a driver, the safety of personnel is guaranteed, a layer of hydrophobic and oleophobic coating is covered on the surfaces of the glass beads, the hydrophobic and oleophobic coating can protect the glass beads, the corrosion of the glass beads is reduced, and the glass beads have stronger light reflecting effect, but the glass beads have smaller diameters, so that when the surfaces of the glass beads are covered with the layer of hydrophobic and oleophobic coating, the adhesion among the glass beads can be caused, the hydrophobic and oleophobic coating among the glass beads needs to be separated subsequently, and the production efficiency is influenced, therefore, the pretreatment equipment disclosed by the invention can mainly realize that the subsequent separation among the glass beads is not needed when the surfaces of the hydrophobic and oleophobic coating are formed on the surfaces of the glass beads, the production efficiency is improved; the specific measures and the using process are as follows: glass beads are put in from a feed port 5 at the top of an outer hemispherical cover 3, then hydrophobic and oleophobic coating is injected into the feed port 5, the hydrophobic and oleophobic coating covers the surface of an inner hemispherical surface 1, the gap between the outer hemispherical cover 3 and the inner hemispherical cover is the diameter of the glass beads, therefore, the glass beads can only enter one circle along the circumferential direction each time, and the hydrophobic and oleophobic coating can be adhered when the glass beads slide down along the outer hemispherical surface, meanwhile, when the glass beads pass through the concave 4, the glass beads can roll at the concave 4, so that the glass beads roll for more circles, so that the surfaces of the glass beads are provided with more uniform hydrophobic and oleophobic coatings, the glass beads adhered with the hydrophobic and oleophobic coatings fall into the annular channel 6, the annular heater 7 in the annular channel 6 quickly dries the hydrophobic and oleophobic coating on the surface of the dropped glass beads, and finally the dried glass beads are not adhered, so that the production efficiency is ensured.

Aiming at the light reflection effect of the silk-screen printing ink, the following experiments are carried out: