Sidelight optical fiber for PVC refrigerator door sealing strip and preparation method of sidelight optical fiber

Abstract

The invention belongs to the technical field of refrigerators, and particularly discloses an edge light optical fiber for a PVC refrigerator door sealing strip, which is prepared from the following raw materials in parts by weight: 100 parts of transparent polymer material monomer, 8 to 30 parts of plasticizer, 0.3 to 5 parts of initiator, 0.1 to 2 parts of scattering particles and 50 to 150 parts of comonomer, the scattering particles are nano silicon dioxide with hydrophobically modified surfaces. According to the sidelight optical fiber for the PVC refrigerator door sealing strip and the preparation method of the sidelight optical fiber, scattering particles are introduced into preparation of the sidelight optical fiber, the lateral light emitting uniformity of the optical fiber can be effectively optimized, the local light spot problem existing in a traditional sidelight optical fiber is remarkably solved by precisely regulating and controlling light scattering distribution, and the service life of the sidelight optical fiber is prolonged. And finally, the homogeneous light-emitting effect of the whole section of optical fiber is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigerator door seals, and particularly relates to a side-light optical fiber for a PVC refrigerator door seal and a preparation method thereof. Background Art

[0002] Traditional refrigerator door seals are mainly made of PVC materials. Although they perform excellently in terms of sealing performance, there are obvious limitations in functionality and aesthetics. Functionally, existing door seals lack an integrated design and cannot provide an auxiliary lighting function, making it difficult for users to quickly locate stored items in a dark environment. Aesthetically, their single appearance design conflicts with the increasing decorative requirements of the high-end home appliance market, especially in the details of enhancing the product style such as ambient light effects, and there are obvious deficiencies. To improve the user experience, the industry has tried to integrate lighting modules into door seals in recent years. However, due to the technical maturity, existing solutions still have systematic defects such as uneven light distribution, excessive energy consumption, or reduced structural reliability. To address such pain points, the current industry exploration mainly focuses on two technical paths: LED lighting and optical fiber light guiding, as follows:

[0003] First, the LED direct lighting solution. This solution realizes basic lighting by embedding discrete LED lamp beads, but is restricted by the characteristics of point light sources, causing multiple problems: At the optical design level, the concentrated light emission leads to a significant spot effect, and the illuminance distribution shows a step-like drop, making it difficult to create a uniform diffused light environment required for high-end home appliances; At the structural reliability level, the physical compatibility between the LED strip and the PVC material is poor, and it is prone to delamination and shedding under the mechanical load of frequent opening and closing, resulting in a reduction in product life.

[0004] Second, the side-light optical fiber integration solution. Although using polymer optical fibers to achieve side light emission has the advantage of morphological plasticity, it is restricted by light transmission loss, scattering control defects, and the presence of air bubbles in the core material, affecting light transmission. The actual light emission uniformity is insufficient, and a continuous and soft ambient light band cannot be formed. More critically, the existing joining process between the side-light optical fiber and PVC is rough, making it difficult to achieve seamless coating, and prone to light spots or dark areas, making it difficult to meet the high-end scenario requirements for "seeing the light but not the source" invisible lighting and decoration integration. Summary of the Invention

[0005] The purpose of the present invention is to provide a side-light optical fiber for a PVC refrigerator door seal and a preparation method thereof, to solve the problems in the prior art that the actual light emission uniformity of the existing side-light optical fiber is insufficient, and the joining process between the side-light optical fiber and PVC is rough, making it difficult to achieve seamless coating, and prone to light spots or dark areas.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a side-light optical fiber for a PVC refrigerator door seal strip, which comprises the following raw materials in parts by weight: 100 parts of a transparent polymer material monomer, 8 - 30 parts of a plasticizer, 0.3 - 5 parts of an initiator, 0.1 - 2 parts of scattering particles, and 50 - 150 parts of a comonomer;

[0008] The scattering particles are nano-silica with surface hydrophobic modification.

[0009] Further, the preparation method of the scattering particles comprises the following steps:

[0010] S1. Prepare a modified chlorosilane

[0011] Mix γ-chloropropene, n-hexyldichlorosilane, and a chloroplatinic acid isopropanol solution to obtain a reaction solution A. Add the reaction solution A to a high-pressure reactor, stir and heat to 80 - 120°C for 1 - 4 h, and then cool to room temperature to obtain the modified chlorosilane;

[0012] S2. Prepare the scattering particles

[0013] Add nano-silica to absolute ethanol, ultrasonically treat for 10 - 20 min, then add the modified chlorosilane to obtain a reaction solution B. Stir and react the reaction solution B at 40 - 60°C for 10 - 20 h, then centrifuge. After centrifugation, collect the centrifugation product, wash the centrifugation product successively with absolute ethanol and water, and then dry and grind it to obtain surface-hydrophobically modified nano-silica, that is, the scattering particles.

[0014] Further, in step S1, the molar ratio of the n-hexyldichlorosilane, γ-chloropropene, and chloroplatinic acid is 1:

[0015] (0.8 - 1.2):(0.00002 - 0.0002).

[0016] Further, in step S2, the mass ratio of the nano-silica to the modified chlorosilane is 1:(4 - 10).

[0017] Further, the particle size of the scattering particles is 900 - 1200 mesh.

[0018] Further, the concentration of the chloroplatinic acid isopropanol solution is 0.01 - 0.10 mol / L.

[0019] Further, the transparent polymer material monomer is any one or more of methyl methacrylate, styrene, methyl acrylate, butyl acrylate, butyl methacrylate, hexafluorobutyl acrylate, hexafluorobutyl methacrylate, dodecafluoroheptyl methacrylate, and dodecafluorooctyl methacrylate, mixed in any proportion.

[0020] Further, the plasticizer is any one or more of dibutyl phthalate, dioctyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, dicyclohexyl phthalate, diisobutyl phthalate, dimethyl phthalate, diethyl phthalate, diisononyl phthalate, diisodecyl phthalate, and epoxidized soybean oil, which are mixed in any proportion.

[0021] Further, the initiator is any one or more of azobisisobutyronitrile, benzoyl peroxide, azobisisoheptonitrile, lauroyl peroxide, tert-butyl peroxide, diisopropylbenzene peroxide, and diisopropyl peroxydicarbonate, which are mixed in any proportion.

[0022] Further, the comonomer is any one or more of methacrylic acid, acrylic acid, benzoic acid, p-methylbenzoic acid, p-ethylbenzoic acid, o-methylbenzoic acid, and o-ethylbenzoic acid, which are mixed in any proportion.

[0023] In a second aspect, the present invention provides a method for preparing a side-light optical fiber for a PVC refrigerator door seal strip, comprising the following steps:

[0024] Step (1): Weigh a transparent polymer material monomer, a plasticizer, an initiator, a scattering particle, and a comonomer according to the formula of a side-light optical fiber for a PVC refrigerator door seal strip provided in the embodiment of the first aspect of the present invention. Using the transparent polymer material monomer as the matrix, add the plasticizer, the initiator, the scattering particle, and the comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer.

[0025] Step (2): Aspirate the prepolymer into the side pipe of the door seal strip by vacuum, seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the bubbles, place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side-light optical fiber for the PVC refrigerator door seal strip.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. For the side-light optical fiber for the PVC refrigerator door seal strip prepared by the present invention, by adding surface-hydrophobic modified nano-silica as the scattering particle, and utilizing the needle effect of the nano-silica on the bubble interface and its surface hydrophobic effect, the content of bubbles in the synthesis raw materials of the side-light optical fiber for the PVC refrigerator door seal strip can be effectively reduced, achieving the effect of defoaming and avoiding the problem of poor system compatibility caused by adding an additional defoaming agent.

[0028] 2. The side-light optical fiber for the PVC refrigerator door seal strip prepared by the present invention uses a novel chlorosilane to hydrophobically modify the surface of nano-silica as scattering particles. Due to the presence of chlorine atoms in the scattering particles, the core material is tightly combined with the PVC cladding, reducing the loss during the scattering process. In addition, the nano-silica modified by chlorosilane can be evenly dispersed in the system, improving the light emission uniformity during the scattering process. These designs significantly improve the local light spot problem existing in the traditional side-light optical fiber, and finally achieve the homogeneous light emission effect of the entire section of the optical fiber.

[0029] 3. In the preparation method of the side-light optical fiber for the PVC refrigerator door seal strip provided by the present invention, the subsequent polymerization of the side-light optical fiber is completed in the side pipe of the door seal strip, further ensuring the tightness of the combination between the prepared side-light optical fiber and the door seal strip, achieving seamless coating, avoiding the appearance of light spots or dark areas, and thus meeting the requirements of high-end scenarios for the integration of "seeing light but not the light source" invisible lighting and decoration. Brief Description of the Drawings

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is a schematic structural diagram of the door seal strip provided by the present invention.

[0032] Among them, the reference numerals are: 1. Door seal strip; 11. Side pipe of the door seal strip. Detailed Description of the Embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "perimeter", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0035] In a first aspect, the present invention provides a side-light optical fiber for a PVC refrigerator door sealing strip, which comprises the following raw materials, measured by weight: 100 parts of a transparent polymer material monomer, 8-30 parts of a plasticizer, 0.3-5 parts of an initiator, 0.1-2 parts of scattering particles, and 50-150 parts of a copolymer monomer;

[0036] The scattering particles are nano-silica with hydrophobic surface modification.

[0037] Specifically, the method for preparing the scattering particles in the raw material composition of the side-light optical fiber for the PVC refrigerator door sealing strip comprises the following steps:

[0038] S1. Preparation of modified chlorosilane

[0039] Mixing γ-chloropropylene, n-hexyldichlorosilane and chloroplatinic acid isopropanol solution to prepare reaction solution A, adding reaction solution A into a high-pressure reactor, stirring and heating to 80-120° C. for 1-4 hours, and cooling to room temperature to obtain modified chlorosilane;

[0040] The reaction process of step S1 is as follows:

[0041]

[0042] In the reaction, chloroplatinic acid isopropanol solution is used as a catalyst to prepare modified chlorosilane through the hydrosilylation reaction of γ-chloropropylene and n-hexyldichlorosilane;

[0043] In step S1, the molar ratio of n-hexyldichlorosilane, γ-chloropropylene and chloroplatinic acid is 1:(0.8-1.2):

[0044] (0.00002-0.0002);

[0045] In addition, in step S1, the concentration of the chloroplatinic acid isopropanol solution is 0.01-0.10 mol / L, preferably the concentration of the chloroplatinic acid isopropanol solution is 0.05 mol / L;

[0046] S2. Preparation of scattering particles

[0047] Adding nano-silica to anhydrous ethanol to obtain a mixture, ultrasonically treating the mixture for 10-20 minutes, adding modified chlorosilane to the ultrasonically treated mixture to obtain a reaction solution B, stirring the reaction solution B at 40-60° C. for 10-20 hours, and then centrifuging it, collecting the centrifugal product after centrifugation, washing the centrifugal product with anhydrous ethanol and water in sequence, and then drying and grinding it to obtain surface hydrophobically modified nano-silica, i.e., scattering particles;

[0048] In step S2, the mass ratio of nano-silicon dioxide to modified chlorosilane is 1:(4-10);

[0049] The dosage ratio of nano-silica to absolute ethanol is 1 g:(30 - 50) mL, and the preferred dosage ratio of nano-silica to absolute ethanol is 1 g:40 mL;

[0050] After grinding, the particle size of the prepared scattering particles is 900 - 1200 mesh;

[0051] In the prior art, the conventional hydrophobic modification method of nano-silica surface by chlorosilane (such as trimethylchlorosilane) is that the Cl - group undergoes hydrolysis in the presence of water or trace water to generate reactive trimethylsilanol ((CH3)3Si-OH). The generated trimethylsilanol undergoes a condensation reaction with the silanol groups (Si-OH) on the surface of nano-silica to form stable Si-O-Si covalent bonds. Its hydrophobic mechanism is as follows: First, through the coverage of surface hydroxyl groups, that is, trimethylsilane replaces the hydrophilic surface hydroxyl groups (Si-OH), reducing the number of surface polar groups; second, three methyl groups (-CH3) are arranged outward to form a dense low-surface-energy hydrophobic layer, and the steric hindrance effect of the methyl groups hinders water molecules from approaching the surface; third, the surface energy of silica is reduced, significantly inhibiting the wettability of water;

[0052] In the present invention, in step S2, since nano-silica and absolute ethanol are mixed to prepare a mixture, and then the modified chlorosilane prepared in step S1 is put into the mixture, the modified chlorosilane prepared in step S1 directly undergoes a nucleophilic substitution reaction with the silanol groups (Si-OH) on the surface of nano-silica, thereby realizing the hydrophobic modification of the nano-silica surface. Moreover, the modified chlorosilane prepared in step S1 contains a straight-chain alkyl group, having a better hydrophobic effect; in addition, the nano-silica hydrophobically modified by the modified chlorosilane prepared in step S1 contains chlorine atoms, so that the prepared surface-hydrophobically modified nano-silica is applied to the production of side-light optical fibers, and the prepared side-light optical fibers can be tightly combined with the PVC cladding of the door seal strip, reducing scattering loss;

[0053] In the raw material composition of the side-light optical fiber for the PVC refrigerator door seal strip, the transparent polymer material monomer is any one or more of methyl methacrylate, styrene, methyl acrylate, butyl acrylate, butyl methacrylate, hexafluorobutyl acrylate, hexafluorobutyl methacrylate, dodecafluoroheptyl methacrylate, and dodecafluorooctyl methacrylate, mixed in any proportion;

[0054] The plasticizer is any one or more of dibutyl phthalate, dioctyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, dicyclohexyl phthalate, diisobutyl phthalate, dimethyl phthalate, diethyl phthalate, diisononyl phthalate, diisodecyl phthalate, and epoxy soybean oil, which are mixed in any proportion;

[0055] The initiator is any one or more of azobisisobutyronitrile, benzoyl peroxide, azobisisoheptonitrile, lauroyl peroxide, tert-butyl peroxide, diisopropylbenzene peroxide, and diisopropyl peroxydicarbonate, which are mixed in any proportion;

[0056] The comonomer is any one or more of methacrylic acid, acrylic acid, benzoic acid, p-methylbenzoic acid, p-ethylbenzoic acid, o-methylbenzoic acid, and o-ethylbenzoic acid, which are mixed in any proportion.

[0057] In the second aspect, as Figure 1 shown, the present invention provides a preparation method for side-light optical fibers for PVC refrigerator door seals, including the following steps:

[0058] Step (1): According to the formula of a side-light optical fiber for a PVC refrigerator door seal provided in the embodiment of the first aspect of the present invention, weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer;

[0059] Step (2): Provide a door seal 1, on which a door seal side pipe 11 is integrally formed. Aspirate the prepolymer of step (1) into the door seal side pipe 11 by vacuum, seal one end of the door seal side pipe 11, plug the other end with absorbent cotton, then remove the bubbles, place the door seal side pipe 11 filled with the prepolymer vertically, and complete the subsequent polymerization in the door seal side pipe 11 to obtain a polymerization product in the door seal side pipe 11. This polymerization product is the side-light optical fiber for the PVC refrigerator door seal.

[0060] In this preparation method, the preparation of the side-light optical fiber for the PVC refrigerator door seal is carried out in the door seal side pipe 11. That is, in step (2), the door seal side pipe 11 filled with the prepolymer is placed vertically, and the subsequent polymerization is completed in the door seal side pipe 11, so as to obtain a polymerization product in the door seal side pipe 11. This polymerization product is the side-light optical fiber for the PVC refrigerator door seal, which can further ensure the tight combination between the side-light optical fiber and the door seal.

[0061] Preparation Example 1

[0062] This preparation example provides a method for preparing scattering particles, which includes the following steps:

[0063] S1. Prepare modified chlorosilane

[0064] Mix γ-chloropropene, n-hexyldichlorosilane and chloroplatinic acid isopropanol solution to obtain reaction solution A. Add reaction solution A to a high-pressure reactor, stir and heat to 100 °C, keep for 2 h, and cool to room temperature to obtain modified chlorosilane;

[0065] In step S1, the molar ratio of n-hexyldichlorosilane, γ-chloropropene, and chloroplatinic acid is 1:0.9:0.00005;

[0066] The concentration of the chloroplatinic acid isopropanol solution is 0.05 mol / L;

[0067] S2. Prepare scattering particles

[0068] Add nano-silica to absolute ethanol to obtain a mixture. After ultrasonic treatment of the mixture for 15 min, add modified chlorosilane to the ultrasonically treated mixture to obtain reaction solution B. After stirring and reacting reaction solution B at 50 °C for 16 h, centrifuge at 10000 r / min for 10 min. After centrifugation, collect the centrifugation product. Wash the centrifugation product successively with absolute ethanol and water, and then dry it at a constant temperature of 60 °C for 24 h and grind it to obtain surface-hydrophobically modified nano-silica, that is, scattering particles;

[0069] In step S2, the dosage ratio of nano-silica to absolute ethanol is preferably 1 g:40 mL; the mass ratio of nano-silica to modified chlorosilane is 1:8; the particle size of the prepared surface-hydrophobically modified nano-silica is 1000 mesh;

[0070] Preparation example 2

[0071] This preparation example provides a method for preparing scattering particles, which includes the following steps:

[0072] S1. Prepare modified chlorosilane

[0073] Mix γ-chloropropene, n-hexyldichlorosilane and chloroplatinic acid isopropanol solution to obtain reaction solution A. Add reaction solution A to a high-pressure reactor, stir and heat to 80 °C, keep for 4 h, and cool to room temperature to obtain modified chlorosilane;

[0074] In step S1, the molar ratio of n-hexyldichlorosilane, γ-chloropropene, and chloroplatinic acid is 1:0.8:0.0002;

[0075] The concentration of the chloroplatinic acid isopropanol solution is 0.05 mol / L;

[0076] S2. Prepare scattering particles

[0077] Add nano-silica into absolute ethanol to obtain a mixture. After ultrasonic treating the mixture for 10 min, add modified chlorosilane into the ultrasonically treated mixture to obtain reaction solution B. After stirring and reacting reaction solution B at 40 °C for 20 h, centrifuge at 10000 r / min for 10 min. After centrifugation, collect the centrifugation product. Wash the centrifugation product successively with absolute ethanol and water, and then dry it at a constant temperature of 60 °C for 24 h and grind it to obtain surface-hydrophobic modified nano-silica, i.e., the scattering particles;

[0078] In step S2, the dosage ratio of nano-silica to absolute ethanol is preferably 1 g:40 mL; the mass ratio of nano-silica to modified chlorosilane is 1:4; the particle size of the prepared surface-hydrophobic modified nano-silica is 1200 mesh.

[0079] Preparation Example 3

[0080] This preparation example provides a preparation method of scattering particles, including the following steps:

[0081] S1. Prepare modified chlorosilane

[0082] Mix γ-chloropropene, n-hexyl dichlorosilane and chloroplatinic acid isopropanol solution to prepare reaction solution A. Add reaction solution A into a high-pressure reactor, stir and heat it to 120 °C for 1 h, and then cool it to room temperature to obtain modified chlorosilane;

[0083] In step S1, the molar ratio of n-hexyl dichlorosilane, γ-chloropropene, and chloroplatinic acid is 1:1.2:0.00002;

[0084] The concentration of the chloroplatinic acid isopropanol solution is 0.05 mol / L;

[0085] S2. Prepare scattering particles

[0086] Add nano-silica into absolute ethanol to obtain a mixture. After ultrasonic treating the mixture for 20 min, add modified chlorosilane into the ultrasonically treated mixture to obtain reaction solution B. After stirring and reacting reaction solution B at 60 °C for 10 h, centrifuge at 10000 r / min for 10 min. After centrifugation, collect the centrifugation product. Wash the centrifugation product successively with absolute ethanol and water, and then dry it at a constant temperature of 60 °C for 24 h and grind it to obtain surface-hydrophobic modified nano-silica, i.e., the scattering particles;

[0087] In step S2, the dosage ratio of nano-silica to absolute ethanol is preferably 1 g:40 mL; the mass ratio of nano-silica to modified chlorosilane is 1:10; the particle size of the prepared surface-hydrophobic modified nano-silica is 900 mesh.

[0088] Preparation Example 4

[0089] This preparation example provides a method for preparing scattering particles, which includes the following steps:

[0090] Add nano-silica into absolute ethanol to obtain a mixture. After ultrasonic treatment of the mixture for 20 min, add trimethylchlorosilane to the ultrasonically treated mixture to obtain reaction solution B. After stirring and reacting reaction solution B at 60 °C for 10 h, centrifuge at 10000 r / min for 10 min. After centrifugation, collect the centrifugation product. Wash the centrifugation product successively with absolute ethanol and water, and then dry it at a constant temperature of 60 °C for 24 h and grind it to obtain surface-hydrophobically modified nano-silica, that is, scattering particles;

[0091] The dosage ratio of nano-silica to absolute ethanol is preferably 1 g:40 mL; the mass ratio of nano-silica to modified chlorosilane is 1:10; the particle size of the prepared surface-hydrophobically modified nano-silica is 900 mesh.

[0092] Example 1

[0093] This example provides a side-light optical fiber for a PVC refrigerator door seal strip and its preparation method, which are specifically as follows:

[0094] A side-light optical fiber for a PVC refrigerator door seal strip, by weight, includes the following raw materials: 100 parts of a transparent polymer material monomer, 20 parts of a plasticizer, 2 parts of an initiator, 1 part of scattering particles, and 100 parts of a comonomer;

[0095] In this example, the transparent polymer material monomer is methyl methacrylate; the plasticizer is dibutyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared from Preparation Example 1; the comonomer is methacrylic acid.

[0096] A preparation method for a side-light optical fiber for a PVC refrigerator door seal strip includes the following steps:

[0097] Step (1), according to the formula of the side-light optical fiber for a PVC refrigerator door seal strip above, weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer;

[0098] Step (2), suck the prepolymer into the side pipe of the door seal strip by vacuum. Seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the bubbles. Place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side-light optical fiber for a PVC refrigerator door seal strip.

[0099] Example 2

[0100] This embodiment provides a side-lighting optical fiber for a PVC refrigerator door sealing strip and a preparation method thereof, which are specifically as follows:

[0101] A side-light optical fiber for a PVC refrigerator door sealing strip comprises the following raw materials, measured by weight: 100 parts of a transparent polymer material monomer, 8 parts of a plasticizer, 5 parts of an initiator, 2 parts of scattering particles, and 150 parts of a comonomer;

[0102] In this embodiment, the monomer of the transparent polymer material is methyl methacrylate; the plasticizer is di-n-butyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared by Preparation Example 2; and the comonomer is methacrylic acid.

[0103] A method for preparing a side-light optical fiber for a PVC refrigerator door sealing strip comprises the following steps:

[0104] Step (1), according to the formula of the side-light optical fiber for the PVC refrigerator door sealing strip, weighing a transparent polymer material monomer, a plasticizer, an initiator, scattering particles, and a comonomer, taking the transparent polymer material monomer as a matrix, adding the plasticizer, the initiator, the scattering particles and the comonomer into the matrix, and performing a prepolymerization reaction to obtain a prepolymer;

[0105] Step (2), vacuuming the prepolymer into the side channel of the door seal, sealing one end of the side channel of the door seal, and plugging the other end with absorbent cotton, then removing bubbles, vertically placing the side channel of the door seal filled with the prepolymer, and completing subsequent polymerization in the side channel of the door seal, thus obtaining a side light optical fiber for a PVC refrigerator door seal.

[0106] Example 3

[0107] This embodiment provides a side-lighting optical fiber for a PVC refrigerator door sealing strip and a preparation method thereof, which are specifically as follows:

[0108] A side-light optical fiber for a PVC refrigerator door sealing strip comprises the following raw materials, measured by weight: 100 parts of a transparent polymer material monomer, 30 parts of a plasticizer, 0.3 parts of an initiator, 0.1 parts of scattering particles, and 50 parts of a copolymer monomer;

[0109] In this embodiment, the monomer of the transparent polymer material is methyl methacrylate; the plasticizer is di-n-butyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared by Preparation Example 3; and the copolymer monomer is methacrylic acid.

[0110] A method for preparing a side-light optical fiber for a PVC refrigerator door sealing strip comprises the following steps:

[0111] Step (1): Weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer according to the formula of the side-light optical fiber for the PVC refrigerator door seal strip above. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer;

[0112] Step (2): Suck the prepolymer into the side pipe of the door seal strip by vacuum. Seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the air bubbles. Place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side-light optical fiber for the PVC refrigerator door seal strip.

[0113] Example 4

[0114] This example provides a side-light optical fiber for a PVC refrigerator door seal strip and its preparation method, which are as follows:

[0115] A side-light optical fiber for a PVC refrigerator door seal strip, by weight, comprises the following raw materials: 100 parts of transparent polymer material monomer, 20 parts of plasticizer, 2 parts of initiator, 1 part of scattering particles, and 100 parts of comonomer;

[0116] In this example, the transparent polymer material monomer is methyl acrylate; the plasticizer is dibutyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared from Preparation Example 1; the comonomer is acrylic acid.

[0117] A preparation method of a side-light optical fiber for a PVC refrigerator door seal strip, comprising the following steps:

[0118] Step (1): Weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer according to the formula of the side-light optical fiber for the PVC refrigerator door seal strip above. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer;

[0119] Step (2): Suck the prepolymer into the side pipe of the door seal strip by vacuum. Seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the air bubbles. Place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side-light optical fiber for the PVC refrigerator door seal strip.

[0120] Example 5

[0121] This example provides a side-light optical fiber for a PVC refrigerator door seal strip and its preparation method, which are as follows:

[0122] A side-light optical fiber for a PVC refrigerator door sealing strip comprises the following raw materials, measured by weight: 100 parts of a transparent polymer material monomer, 20 parts of a plasticizer, 2 parts of an initiator, 1 part of scattering particles, and 100 parts of a copolymer monomer;

[0123] In this embodiment, the monomer of the transparent polymer material is hexafluorobutyl acrylate; the plasticizer is di-n-butyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared by Preparation Example 1; and the comonomer is methacrylic acid.

[0124] A method for preparing a side-light optical fiber for a PVC refrigerator door sealing strip comprises the following steps:

[0125] Step (1), according to the formula of the side-light optical fiber for the PVC refrigerator door sealing strip, weighing a transparent polymer material monomer, a plasticizer, an initiator, scattering particles, and a comonomer, taking the transparent polymer material monomer as a matrix, adding the plasticizer, the initiator, the scattering particles and the comonomer into the matrix, and performing a prepolymerization reaction to obtain a prepolymer;

[0126] Step (2), vacuuming the prepolymer into the side channel of the door seal, sealing one end of the side channel of the door seal, and plugging the other end with absorbent cotton, then removing bubbles, vertically placing the side channel of the door seal filled with the prepolymer, and completing subsequent polymerization in the side channel of the door seal, thus obtaining a side light optical fiber for a PVC refrigerator door seal.

[0127] Comparative Example 1

[0128] This comparative example provides a side-light optical fiber for a PVC refrigerator door sealing strip and a preparation method thereof, which are as follows:

[0129] A side-light optical fiber for a PVC refrigerator door sealing strip comprises the following raw materials, measured by weight: 100 parts of a transparent polymer material monomer, 20 parts of a plasticizer, 2 parts of an initiator, 1 part of scattering particles, and 100 parts of a copolymer monomer;

[0130] In this comparative example, the monomer of the transparent polymer material is methyl methacrylate; the plasticizer is di-n-butyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are nano-silicon dioxide; and the copolymer monomer is methacrylic acid.

[0131] A method for preparing a side-light optical fiber for a PVC refrigerator door sealing strip comprises the following steps:

[0132] Step (1), according to the formula of the side-light optical fiber for the PVC refrigerator door sealing strip, weighing a transparent polymer material monomer, a plasticizer, an initiator, scattering particles, and a comonomer, taking the transparent polymer material monomer as a matrix, adding the plasticizer, the initiator, the scattering particles and the comonomer into the matrix, and performing a prepolymerization reaction to obtain a prepolymer;

[0133] Step (2): Suck the prepolymer into the side pipe of the door seal strip by vacuum, seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the air bubbles, place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side light optical fiber for the PVC refrigerator door seal strip.

[0134] Comparative Example 2

[0135] This comparative example provides a side light optical fiber for a PVC refrigerator door seal strip and its preparation method, which are as follows:

[0136] A side light optical fiber for a PVC refrigerator door seal strip, by weight, comprises the following raw materials: 100 parts of a transparent polymer material monomer, 20 parts of a plasticizer, 2 parts of an initiator, 1 part of a polyether defoaming agent, and 100 parts of a comonomer;

[0137] In this example, the transparent polymer material monomer is methyl methacrylate; the plasticizer is dibutyl phthalate; the initiator is azobisisobutyronitrile; and the comonomer is methacrylic acid.

[0138] A preparation method of a side light optical fiber for a PVC refrigerator door seal strip comprises the following steps:

[0139] Step (1): Weigh the transparent polymer material monomer, plasticizer, initiator, polyether defoaming agent, and comonomer according to the formula of the side light optical fiber for the PVC refrigerator door seal strip above. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, polyether defoaming agent, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer;

[0140] Step (2): Suck the prepolymer into the side pipe of the door seal strip by vacuum, seal one end of the side pipe of the door seal strip, plug the other end with absorbent cotton, then remove the air bubbles, place the side pipe of the door seal strip filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal strip to obtain the side light optical fiber for the PVC refrigerator door seal strip.

[0141] Comparative Example 3

[0142] This comparative example provides a side light optical fiber for a PVC refrigerator door seal strip and its preparation method, which are as follows:

[0143] A side light optical fiber for a PVC refrigerator door seal strip, by weight, comprises the following raw materials: 100 parts of a transparent polymer material monomer, 30 parts of a plasticizer, 0.3 part of an initiator, 0.1 part of a scattering particle, and 50 parts of a comonomer;

[0144] In this comparative example, the transparent polymer material monomer is methyl methacrylate; the plasticizer is dibutyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared from Preparation Example 3; the comonomer is methacrylic acid.

[0145] A method for preparing side-light optical fibers for a PVC refrigerator door seal strip includes the following steps:

[0146] Step (1): Weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer according to the formula of the side-light optical fibers for the PVC refrigerator door seal strip described above. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer.

[0147] Step (2): Vacuum suck the prepolymer into a pipe mold. Seal one end of the pipe mold, plug the other end with absorbent cotton, then remove the bubbles. Place the pipe mold containing the prepolymer vertically, and complete the subsequent polymerization in the pipe mold. After demolding, the side-light optical fibers for the PVC refrigerator door seal strip are obtained.

[0148] Comparative Example 4

[0149] This comparative example provides a side-light optical fiber for a PVC refrigerator door seal strip and a preparation method thereof, which are specifically as follows:

[0150] A side-light optical fiber for a PVC refrigerator door seal strip, by weight, includes the following raw materials: 100 parts of transparent polymer material monomer, 30 parts of plasticizer, 0.3 parts of initiator, 0.1 part of scattering particles, and 50 parts of comonomer.

[0151] In this comparative example, the transparent polymer material monomer is methyl methacrylate; the plasticizer is dibutyl phthalate; the initiator is azobisisobutyronitrile; the scattering particles are prepared from Preparation Example 4; the comonomer is methacrylic acid.

[0152] A method for preparing side-light optical fibers for a PVC refrigerator door seal strip includes the following steps:

[0153] Step (1): Weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer according to the formula of the side-light optical fibers for the PVC refrigerator door seal strip described above. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer.

[0154] Step (2): Vacuum suck the prepolymer into the pipeline mold, seal one end of the pipeline mold, plug the other end with absorbent cotton, then remove the air bubbles, place the pipeline mold filled with the prepolymer vertically, and complete the subsequent polymerization in the pipeline mold. After demolding, the side-light optical fiber for the PVC refrigerator door seal strip is obtained.

[0155] Performance test

[0156] In the preparation methods of the side-light optical fibers for the PVC refrigerator door seal strips provided in Examples 1-3 and Comparative Examples 1-2, the subsequent polymerization is completed in the pipeline on the side of the door seal strip, thus ensuring the seamless coating of the door seal strip and the side-light optical fiber, and the luminous effect of the side-light optical fiber in the door seal strip can be directly evaluated; assemble the side-light optical fibers provided in Comparative Example 3 and Comparative Example 4 in the pipeline on the side of the door seal strip, and evaluate the luminous effect of the side-light optical fiber in the door seal strip;

[0157] The evaluation criteria are as follows:

[0158] Evaluation of the luminous effect: Evaluated by the international standard CIE S 008 / E-2001, the uniformity is 0.1-1, above 0.5 is good, and above 0.7 is excellent;

[0159] Glare, divided into A, B, C, D, E, where A is of very high quality and E is of very poor quality.

[0160] CIE is divided into five quality levels according to different requirements for restricting direct glare, specifically as follows:

[0161] A (very high quality): Suitable for very precise visual tasks, such as operating rooms, wards, computer rooms, etc.

[0162] B (high quality): Suitable for tasks with high visual requirements and medium visual requirements, but require high concentration of attention, such as classrooms, reading rooms, etc.

[0163] C (medium quality): Suitable for tasks with medium visual requirements, medium concentration of attention, and the worker sometimes moves around, such as meeting rooms, business halls, etc.

[0164] D (poor quality): Suitable for tasks with relatively low requirements for visual and attention concentration, and the worker often moves within the specified area, such as corridors.

[0165] E (very poor quality): The worker is not limited to a certain work station indoors, but walks around. The visual requirements of the task are low, or it is an indoor area not continuously used by the same group of people, such as warehouses, storage rooms, etc.

[0166] The evaluation of the luminous effects of the side-light optical fibers prepared in Examples 1-3 and Comparative Examples 1-4 is shown in Table 1;

[0167] Table 1

[0168] Group Uniformity Quality Grade Example 1 0.7 B Example 2 0.7 B Example 3 0.7 B Example 4 0.7 B Example 5 0.7 B Comparative Example 1 0.5 D Comparative Example 2 0.3 D Comparative Example 3 0.6 C Comparative Example 4 0.7 C

[0169] Analysis of the data in Table 1 shows that the side-light optical fibers provided in Examples 1-5 have better light emission uniformity and quality grades than those provided in Comparative Examples 1-4. By comparing the data of Examples 1-5 with those of Comparative Example 1 and Comparative Example 2, it can be concluded that by introducing hydrophobically modified nano-silica, the present invention achieves better scattering light emission uniformity and quality than the nano-silica monomer and the defoamer monomer. Comparing the data of Examples 1-5 with that of Comparative Example 4, the subsequent polymerization of the side-light optical fiber in the present invention is carried out in the side pipe 11 of the door seal strip to achieve a tight combination of the door seal strip and the side-light optical fiber, thereby improving its light emission effect and quality. Comparing the data of Examples 1-5 with that of Comparative Example 4, by introducing a modified chlorosilane modified nano-silica containing chlorine atoms and straight-chain alkyl groups, the interfacial bonding force of the side-light optical fiber is greatly improved, the light emission quality of the side-light optical fiber is greatly improved, and a homogeneous light emission effect of the entire section of the optical fiber is achieved.

[0170] Based on the above content, a side-light optical fiber for a PVC refrigerator door seal strip and a preparation method thereof provided by the present invention can effectively solve the problems of insufficient actual light emission uniformity of the side-light optical fiber in the prior art and rough bonding process between the side-light optical fiber and PVC, which is difficult to achieve seamless coating and is prone to light spots or dark areas. The prepared side-light optical fiber not only has good light emission uniformity, but also is tightly combined with the door seal strip, significantly improving the local light spot problem existing in the traditional side-light optical fiber, and meeting the requirements of high-end scenarios for the integration of "seeing light but not the light source" invisible lighting and decoration.

[0171] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0172] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A side-light optical fiber for a PVC refrigerator door sealing strip, characterized in that, By weight parts, it includes the following raw materials: 100 parts of transparent polymer material monomer, 8 - 30 parts of plasticizer, 0.3 - 5 parts of initiator, 0.1 - 2 parts of scattering particles, and 50 - 150 parts of comonomer; The scattering particles are nano - silica with surface hydrophobic modification.

2. The side light optical fiber for a PVC refrigerator door sealing strip according to claim 1, characterized in that, The preparation method of the scattering particles includes the following steps: S1. Prepare modified chlorosilane Mix γ - chloropropylene, n - hexyl dichlorosilane, and chloroplatinic acid isopropanol solution to obtain reaction solution A. Add reaction solution A to a high - pressure reactor, stir and heat to 80 - 120 °C for 1 - 4 h, and then cool to room temperature to obtain modified chlorosilane; S2. Prepare scattering particles Add nano - silica to anhydrous ethanol, after ultrasonic treatment for 10 - 20 min, add modified chlorosilane to obtain reaction solution B. Stir and react reaction solution B at 40 - 60 °C for 10 - 20 h, then perform centrifugation. After centrifugation, collect the centrifugation product, wash the centrifugation product successively with anhydrous ethanol and water, and then after drying and grinding, obtain surface - hydrophobic - modified nano - silica, that is, scattering particles.

3. The side light optical fiber for a PVC refrigerator door seal strip according to claim 2, characterized in that, In step S1, the molar ratio of n - hexyl dichlorosilane, γ - chloropropylene, and chloroplatinic acid is 1:(0.8 - 1.2): (0.00002-0.0002)； The concentration of the chloroplatinic acid isopropanol solution is 0.01 - 0.10 mol / L.

4. The side-light optical fiber for a PVC refrigerator door seal strip according to claim 2, characterized in that, In step S2, the mass ratio of nano - silica to modified chlorosilane is 1:(4 - 10).

5. The side-light optical fiber for a PVC refrigerator door sealing strip according to claim 2, characterized in that, The particle size of the scattering particles is 900 - 1200 mesh.

6. The side-light optical fiber for a PVC refrigerator door sealing strip according to claim 1, characterized in that, The transparent polymer material monomer is any one or more of methyl methacrylate, styrene, methyl acrylate, butyl acrylate, butyl methacrylate, hexafluorobutyl acrylate, hexafluorobutyl methacrylate, dodecafluoroheptyl methacrylate, dodecafluorooctyl methacrylate, mixed in any proportion.

7. The side-light optical fiber for a PVC refrigerator door sealing strip according to claim 1, characterized in that, The plasticizer is any one or more of di - n - butyl phthalate, dioctyl phthalate, butyl benzyl phthalate, di - sec - octyl phthalate, dicyclohexyl phthalate, di - isobutyl phthalate, dimethyl phthalate, diethyl phthalate, di - isononyl phthalate, di - isodecyl phthalate, epoxy soybean oil, mixed in any proportion.

8. The side light optical fiber for a PVC refrigerator door seal strip according to claim 1, characterized in that, The initiator is any one or more of azobisisobutyronitrile, benzoyl peroxide, azobisisoheptonitrile, lauroyl peroxide, tert - butyl peroxide, di - isopropylbenzene peroxide, di - isopropyl peroxydicarbonate, mixed in any proportion.

9. The side-light optical fiber for a PVC refrigerator door sealing strip according to claim 1, characterized in that, The comonomer is any one or more of methacrylic acid, acrylic acid, benzoic acid, p - methylbenzoic acid, p - ethylbenzoic acid, o - methylbenzoic acid, o - ethylbenzoic acid, mixed in any proportion.

10. A method for preparing a side-light optical fiber for a PVC refrigerator door sealing strip according to any one of claims 1-9, characterized in that, It includes the following steps: Step (1). According to the formula of the side - light optical fiber for the PVC refrigerator door seal, weigh the transparent polymer material monomer, plasticizer, initiator, scattering particles, and comonomer. Using the transparent polymer material monomer as the matrix, add the plasticizer, initiator, scattering particles, and comonomer to the matrix, and carry out a prepolymerization reaction to obtain a prepolymer; Step (2): Use vacuum to suck the prepolymer into the side pipe of the door seal. Seal one end of the side pipe of the door seal, plug the other end with absorbent cotton, then remove the air bubbles. Place the side pipe of the door seal filled with the prepolymer vertically, and complete the subsequent polymerization in the side pipe of the door seal to obtain the side optical fiber for the PVC refrigerator door seal.

Images