CN214735508U - Stay wire - Google Patents

Abstract

The utility model discloses a act as go-between. The utility model discloses act as go-between including the pressure sensitive adhesive layer, substrate layer and the antiseized layer that from top to bottom connect gradually, wherein, the material of substrate layer is biodegradable biaxial stretching polypropylene layer, polyethylene terephthalate layer or polylactic acid layer, and thickness is 20 ~ 40 mu m, not only gives the degradability of acting as go-between, and packing outward appearance roughness when still making act as go-between and packing material complex obtains guaranteeing, and breaking strength satisfies the demand when acting as go-between and unsealing, ensures simultaneously to act as go-between to have good light transmissivity and plasticity.

Description

Stay wire

Technical Field

The utility model belongs to the packaging field, concretely relates to act as go-between.

Background

With the higher environmental protection requirements of society, plastic products polluting the environment gradually exit the market as a trend. The pull wire used in the packaging industry of food, medicine, tobacco and the like in the market at present basically takes plastic such as biaxially oriented polypropylene (BOPP), polyethylene terephthalate (PET) and the like as a base material. The presence of these materials is problematic in that they are difficult or impossible to degrade; meanwhile, the stay wire has small volume, low recycling value and inconvenient targeted recovery, thereby bringing great influence on air, water and soil.

Therefore, it is desirable to develop a degradable pull cord.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects and deficiencies existing in the prior art, the utility model aims to provide a stay wire which has good biodegradability and good mechanical property.

In order to achieve the above object, the utility model discloses a technical scheme be: the utility model provides a act as go-between, includes pressure sensitive adhesive layer, substrate layer and the antiseized layer that from top to bottom connects gradually, wherein, the material of substrate layer is biodegradable biaxially oriented polypropylene (BOPP), polyethylene terephthalate (PET) or polylactic acid (PLA), the thickness of substrate layer is 20 ~ 40 mu m.

The biodegradable biaxially oriented polypropylene is prepared by taking polypropylene as a base material and adding degradable components, such as CN 102019736A; the biodegradable polyethylene terephthalate is prepared by taking polyethylene terephthalate as base material, and adding degradable components such as CN 108146844A; polylactic acid is a novel biodegradable material, and degradable components can be added or not added. The pull wire takes biodegradable biaxially oriented polypropylene, biodegradable polyethylene terephthalate or biodegradable polylactic acid as a base material layer material, so that the pull wire has degradability and reduces the pollution to the environment; meanwhile, the thickness of the base material layer is set to be 20-40 mu m, so that the flatness of the package appearance is guaranteed when the stay wire is compounded with the package, the breaking strength meets the requirement when the stay wire is unsealed, and the stay wire is guaranteed to have good light transmittance and plasticity.

Preferably, the pressure sensitive adhesive layer is a water-based pressure sensitive adhesive layer. Compared with the traditional pressure-sensitive adhesive, the water-based pressure-sensitive adhesive is more environment-friendly, and has higher stripping force and stripping degree and good initial adhesion and retention.

Preferably, the thickness of the pressure-sensitive adhesive layer is 4-30 μm, so that the stay wire has good adhesive property.

Preferably, the pressure-sensitive adhesive layer is coated on one side of the substrate layer by a gumming process.

Preferably, the release layer is a silicone oil release layer.

Preferably, the thickness of the anti-sticking layer is 0.1-20 μm, which can prevent the string from sticking to the product.

Preferably, the release layer is coated on one side of the substrate layer by a coating process.

Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses act as the substrate layer with thickness 20 ~ 40 μm's biodegradable biaxially oriented polypropylene layer, polyethylene terephthalate layer or polylactic acid layer, not only give the degradation performance of acting as go-between, still make to act as go-between have good mechanical properties.

Drawings

FIG. 1 is a schematic structural view of a stay wire in an embodiment;

1-substrate layer, 2-anti-sticking layer, 3-pressure sensitive adhesive layer.

Detailed Description

For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.

Examples

The embodiment is an implementation mode of the stay wire of the present invention, and the specific structure of the stay wire is shown in fig. 1.

The pressure-sensitive adhesive layer 3, the substrate layer 1 and the anti-sticking layer 2 that this acting as go-between distributed from top to bottom in proper order, wherein the material of substrate layer 1 is biodegradable biaxially oriented polypropylene layer, polyethylene terephthalate layer or polylactic acid layer, and thickness is 20 ~ 40 mu m. The stay wire has good biodegradability, the thickness of the base material layer is set to be 20-40 mu m, so that the flatness of the package appearance is guaranteed when the stay wire is compounded with a package, the breaking strength meets the requirement when the stay wire is unsealed, and meanwhile, the stay wire is guaranteed to have good light transmittance and plasticity.

Preferably, the pressure-sensitive adhesive layer 3 is a water-based pressure-sensitive adhesive layer. Compared with the traditional pressure-sensitive adhesive, the water-based pressure-sensitive adhesive is more environment-friendly, and has higher stripping force and stripping degree and good initial adhesion and retention. The thickness of the pressure-sensitive adhesive layer 3 is set to be 4-30 mu m, so that the stay wire can be ensured to have good adhesive property.

The pressure-sensitive adhesive layer 3 may be formed by coating a pressure-sensitive adhesive on one side of the substrate layer 1 by a coating process, and then drying and curing.

Preferably, the release layer 2 is a silicone oil release layer. When the anti-sticking layer 2 is an organic silicon oil anti-sticking layer, the thickness of the anti-sticking layer is only 0.1-20 mu m, so that the stay wire can be prevented from being adhered to a product.

The release layer 2 may be formed by applying a release solution to one surface of the base material layer 1 by a coating process and then UV-curing.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (7)

1. The utility model provides a act as go-between, its characterized in that, includes pressure sensitive adhesive layer, substrate layer and antiseized layer that from top to bottom connects gradually, wherein, the material of substrate layer is biodegradable biaxially oriented polypropylene, polyethylene terephthalate or polylactic acid, the thickness of substrate layer is 20 ~ 40 mu m.

2. The pull cord of claim 1, wherein the pressure sensitive adhesive layer is a water-based pressure sensitive adhesive layer.

3. The pulling cord as set forth in claim 1, wherein the pressure-sensitive adhesive layer has a thickness of 4 to 30 μm.

4. The pulling cord as set forth in claim 1, wherein said pressure sensitive adhesive layer is applied to one side of said substrate layer by a gumming process.

5. The puller wire of claim 1, wherein the release layer is a silicone oil release layer.

6. The puller wire of claim 1, wherein the release layer has a thickness of 0.1 to 20 μm.

7. The puller wire of claim 1, wherein the release layer is applied to one side of the substrate layer by a coating process.

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