阅读说明：本技术 一种高周波热熔贴合不打火的反光膜 (High-frequency hot-melt laminating non-ignition reflective film ) 是由 赵利君 陈国顺 王增友 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种高周波热熔贴合不打火的反光膜,由内至外依次包括如下结构层：高周波贴合粘结层,聚氨酯粘结层,镀膜反光层,硅胶层,玻璃微珠层,热熔层及PET膜。本发明的反光膜在使用高周波热熔机贴合的时候不会产生火花,冲压成型好,加工方便,水洗后反光系数好,可以对PVC、PU、涤纶、棉、等多种基材进行热熔贴合。(The invention discloses a high-frequency hot-melt laminated non-ignition reflective film, which sequentially comprises the following structural layers from inside to outside: the high-frequency laminating adhesive layer, the polyurethane adhesive layer, the coated film reflecting layer, the silica gel layer, the glass bead layer, the hot melt layer and the PET film. The reflective film disclosed by the invention does not generate sparks when being laminated by using a high-frequency hot melting machine, is good in punch forming, convenient to process and good in reflection coefficient after being washed, and can be used for hot melting lamination of various substrates such as PVC, PU, terylene, cotton and the like.)

1. The utility model provides a reflective membrane that high frequency hot melt laminating did not strike sparks which characterized in that: the composite material sequentially comprises the following structural layers from inside to outside: the high-frequency laminating adhesive layer, the polyurethane adhesive layer, the coated film reflecting layer, the silica gel layer, the glass bead layer, the hot melt layer and the PET film.

2. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the polyurethane bonding layer is formed by two-component polyurethane adhesive.

3. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the film-coated reflecting layer is one or a combination of aluminum film coating, silver film coating, zinc sulfide film coating, magnesium film coating and copper film coating.

4. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the high-frequency bonding layer is composed of one or more layers of PES hot melt adhesive films.

5. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the material of the hot melting layer is EVA, and the VA content in the EVA is 28-40%.

6. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the thickness of the glass bead layer is 30-90 microns, and the thickness of the silica gel layer is 5-8 microns.

7. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the thickness of the coated reflecting layer is 10-20 nanometers.

8. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the thickness of the polyurethane bonding layer is 180-220 microns, and the thickness of the high-frequency bonding layer is 40-60 microns.

9. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the thickness of the hot-melt layer is 30-60 microns, and the thickness of the PET film is 50-70 microns.

10. The high frequency hot melt laminated non-sparking reflective film according to claim 1, characterized in that: the glass beads of the glass bead layer are partially embedded into the hot melt layer, the depth of the glass beads embedded into the hot melt layer is 1/3-1/2 of the diameter of the glass beads, the using amount of the glass beads is 118-135g per square meter, the glass beads are formed by mixing glass beads with the refractive index of 1.90 and glass beads with the refractive index of 1.93, and the mass percentage content of the glass beads with the refractive index of 1.90 is 25-35%.

Technical Field

The invention relates to the technical field of reflective film production, in particular to a high-frequency hot-melt laminating non-ignition reflective film.

Background

The principle of the retroreflective material, also called retro-reflective material or retro-reflective material, is to embed a high refractive index glass micro-bead or micro-prism structure on the surface of the corresponding material and reflect the light back to the light source as it is, thereby forming the retro-reflection (also called "retro-reflection") phenomenon. With the improvement of the material culture level of the modern society, the safety awareness of people is deepened day by day, the safety requirement is higher and higher, and the reflective material which is mainly applied to the traffic field originally begins to expand to the personal safety protection field. The reflective material is widely applied to the fields of traffic, fire fighting, environmental sanitation, mining, advertising and the like by virtue of the advantages of high efficiency, environmental protection and energy conservation. In recent years, the trend of blending reflective materials into daily life of people is increasingly obvious, and the trend of improving the appearance and the safety of products by using the reflective materials appears in the fields of clothes, shoes, bags and the like.

The high frequency hot melting is to use an electronic self-excited oscillator to generate a high frequency electric field, apply the high frequency electric field on an electrode, and the molecular structure of the plastic generates polarization phenomenon and self generates heat under the action of the high frequency electric field, so that the purpose of hot melting is achieved under the action of pressure. The high frequency is mainly used in the medical article industry, the plastic and plastic packaging industry, the garment embossing processing industry, the automobile interior trim industry, the inflatable toy industry, the household article industry and the processing, heat sealing and welding sealing of various plastic products such as: plastic uptake bulb shell sealing, PVC plastic bulb shell sealing, PVC bulb shell welding, PVC plastic bulb shell welding, battery package sealing, hardware tool sealing, PETG plastic uptake bulb shell sealing, plastic uptake paperboard sealing, U-disk package sealing, memory stick package sealing, PVC bubble cap welding, high-frequency plastic sealing, double-sided bulb shell sealing, PVC double-sided bubble cap sealing, double-sided paperboard bulb shell sealing, paperboard bubble cap sealing, plastic heat seal welding and the like. Particularly, high-frequency hot-melt bonding is the most convenient and efficient mode in the fields of clothing, shoes, bags and the like, but the existing reflective film for high-frequency hot-melt bonding has the fatal defect, the ignition phenomenon can be generated during high-frequency hot-melt bonding, and after ignition, the base material and the hot-bonded reflective film can be ignited, so that the whole product is damaged.

Disclosure of Invention

The invention aims to provide a high-frequency hot-melt laminating non-sparking reflective film, which has the advantages of no sparking during high-frequency hot-melt laminating, good punch forming, convenient processing, good light emission coefficient after washing and the like, and can be used for hot-melt laminating of various base materials such as PVC, PU, terylene, cotton and the like.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a reflective membrane that high frequency hot melt laminating was not struck sparks, from interior to exterior includes following structural layer in proper order: the high-frequency laminating adhesive layer, the polyurethane adhesive layer, the coated film reflecting layer, the silica gel layer, the glass bead layer, the hot melt layer and the PET film.

The polyurethane bonding layer is formed by two-component polyurethane adhesive. The double-component polyurethane adhesive is adopted to bond the optical coating layer and the high-frequency hot-melt adhesive layer, so that the coating layer is not easy to wash off when the coating layer is washed in a washing machine in the later use.

The film-coated reflecting layer is one or a combination of aluminum film coating, silver film coating, zinc sulfide film coating, magnesium film coating and copper film coating.

The high-frequency bonding layer is composed of one or more layers of PES hot melt adhesive films. The purpose of adopting the PES hot-melt adhesive film is to bond various substrates, such as PVC, PU, cotton, terylene and the like, in order to expand the application range of the hot-melt laminated reflective film.

The material of the hot melting layer is EVA, and the VA content in the EVA is 28-40%.

The thickness of the glass bead layer is 30-90 microns, and the thickness of the silica gel layer is 5-8 microns.

The thickness of the coated reflecting layer is 10-20 nanometers.

The thickness of the polyurethane bonding layer is 180-220 microns, and the thickness of the high-frequency bonding layer is 40-60 microns.

The thickness of the hot-melt layer is 30-60 microns, and the thickness of the PET film is 50-70 microns.

The glass beads of the glass bead layer are partially embedded into the hot melt layer, the depth of the glass beads embedded into the hot melt layer is 1/3-1/2 of the diameter of the glass beads, the using amount of the glass beads is 118-135g per square meter, the glass beads are formed by mixing glass beads with the refractive index of 1.90 and glass beads with the refractive index of 1.93, and the mass percentage content of the glass beads with the refractive index of 1.90 is 25-35%.

Gaps exist among the glass beads of the glass bead layer, and the hot melting layer at the gaps is in direct contact with the silica gel layer.

According to the invention, the adhesive force between the layers is sequenced, namely the adhesive force of the PET film and the hot melt layer (EVA) is more than the adhesive force of the silica gel layer and the hot melt layer (EVA), more than the adhesive force of the polyurethane adhesive layer and the adhesive force of the hot melt layer are more than the adhesive force of the silica gel layer and the glass microsphere layer.

The reason why the sparking phenomenon occurs during the high-frequency hot melting and laminating is as follows: when the high-frequency hot melting is attached, the coated reflective layer is made of a metal material and has free electrons, so that current can be generated, sufficient displacement is realized, and the current can be ignited on the substrate when acting.

Before the later-stage high-frequency hot melting is used, the PET film is required to be torn, the PET film drives the hot melting layer, and then the adhesive force between the hot melting layer and the silica gel layer is larger than that between the hot melting layer and the glass bead layer, and the adhesive force between the hot melting layer and the glass bead layer is smaller than that between the silica gel layer and the glass bead layer, so that the hot melting layer can tear the part of the silica gel layer which is in contact with the hot melting layer together, but the glass bead layer cannot be torn; furthermore, because the adhesive force between the coating reflective layer and the silica gel layer is greater than that between the polyurethane adhesive layer and the coating reflective layer, part of the silica gel layer is torn off and the coating reflective layer contacted with the silica gel layer is torn off together, and finally the coating reflective layer is provided with a hollow area, so that the electron displacement is less, the generated current is low, and the ignition phenomenon cannot be generated.

The invention has the beneficial effects that:

1. the high-frequency hot melting and laminating are not ignited.

2. The reflective product bonded by the product of the invention is washable.

3. Can be hot-melted and jointed with various base materials at high frequency.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be further specifically described below by way of specific examples.

In the present invention, the raw materials and equipment used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.

The material of the hot melt layer is EVA, commercially available as EVA40W from mitsui chemical, japan.

Silica gel, commercially available as mezzanine TSE 3941.