Easily-bent transparent PET (Polyethylene Terephthalate) sheet

Abstract

The utility model discloses an easy-to-bend transparent PET (polyethylene terephthalate) sheet, which belongs to the technical field of PET sheets and comprises a bottom layer for the innermost layer of a packaging box, an elastic foaming layer with buffering performance is compositely connected to the surface of the bottom layer, and a glass fiber layer is compositely connected to the surface of the elastic foaming layer. The surface of the glass fiber layer is compositely connected with a wear-resistant layer for enhancing the strength and stability of the material, and the surface of the wear-resistant layer is provided with a UV coating for protecting the material from being damaged by ultraviolet rays; bending mechanisms for assisting the PET sheet in bending are arranged on the glass fiber layer and the wear-resistant layer; the elastic foaming layer, the glass fiber layer and the wear-resistant layer in the PET sheet are easy to bend through design, so that when the PET sheet is applied to wine box packaging, the outer surface is not easy to break under the action of pressure, and the packaging flexibility is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to PET sheet technology field, concretely is a kind of easy bending transparent PET sheet. BACKGROUND

[0002] The PVC sheet is a kind of packaging material combined with the flocking technology and the characteristics of PVC material, with good toughness and durability, and the surface is treated by flocking, and the appearance is more beautiful, and the touch is soft, and is commonly used in the inner lining or decoration of high-grade wine box, gift box and other products.

[0003] For example, the patent with publication number CN209999819U discloses a PET composite sheet, which comprises a PET substrate layer, a fifth groove in the shape of an inverted circular truncated cone is equidistantly formed on the upper surface of the PET substrate layer, a first adhesive layer is arranged on the upper surface of the PET substrate layer, a first PETG substrate layer is adhered to the side of the first adhesive layer away from the PET substrate layer, a fourth groove in the shape of a circular truncated cone is equidistantly formed on the side of the first PETG substrate layer close to the first adhesive layer, and a sixth groove in the shape of a hemisphere is equidistantly formed on the side of the PET substrate layer away from the first adhesive layer; the PET substrate layer is adhered to the first PETG substrate layer and the second PETG substrate layer through the first adhesive layer and the second adhesive layer, thereby forming the PET composite sheet, and the fifth groove and the fourth groove are arranged to improve the firmness of the adhesion between the PET substrate layer and the first PETG substrate layer, and the sixth groove and the seventh groove are arranged to improve the firmness of the adhesion between the PET substrate layer and the second PETG substrate layer; some PET sheets are not easy to bend due to their high hardness, which may result in insufficient flexibility in packaging design, for example, when making complex wine box structures or folding packaging, the PET sheet may not meet the design requirements, thereby limiting the aesthetics and functionality of the packaging, and the PET sheet with high hardness and not easy to bend may be easily broken under external pressure when applied to packaging, and has low external force buffering performance.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original PET sheet. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of easy bending transparent PET sheet, to solve the problem that part PET sheet is not easy to bend due to its high hardness in the above background art, which may result in insufficient flexibility in packaging design, for example, when making complex wine box structures or folding packaging, the PET sheet may not meet the design requirements, thereby limiting the aesthetics and functionality of the packaging.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: an easy bending transparent PET sheet, including the bottom layer for the innermost layer of the packaging box, the bottom layer surface is connected with the elastic foaming layer with buffering performance, the elastic foaming layer surface is connected with the glass fiber layer, the glass fiber layer surface is connected with the wear -resisting layer of reinforcing material strength and stability, and the wear -resisting layer surface is provided with the UV coating of protective material from ultraviolet damage, be provided with the bending mechanism of assisting PET sheet bending on glass fiber layer and wear -resisting layer.

[0007] Preferably, the glass fiber layer and the wear-resistant layer are both added with powder nitrile rubber to improve the toughness and bending resistance of the sheet.

[0008] Preferably, the bending mechanism includes a plurality of outer bending grooves equally spaced on the wear-resistant layer.

[0009] Preferably, the bending mechanism further includes a plurality of inner bending grooves equally spaced on the glass fiber layer.

[0010] Preferably, the distance between adjacent inner bending grooves is greater than the distance between adjacent outer bending grooves, and the inner bending grooves and the outer bending grooves are distributed in a staggered manner.

[0011] Preferably, the inner bending grooves and the outer bending grooves are provided with arc corners on both sides of the open ends above them.

[0012] Preferably, the elastic foaming layer includes an upper foaming layer, a middle foaming layer and a lower foaming layer; the upper foaming layer is connected to the surface of the glass fiber layer, the lower foaming layer is connected to the surface of the bottom layer, and the middle foaming layer is arranged between the upper and lower foaming layers.

[0013] Preferably, the upper, middle and lower foaming layers are prepared from polyethylene terephthalate and a branching agent; the densities of the upper, middle and lower foaming layers increase in order.

[0014] Compared with the prior art, the utility model has the advantages that: the easy bending transparent PET sheet is formed by the bottom layer, the elastic foaming layer, the glass fiber layer, the wear-resistant layer and the UV coating, the prepared transparent PET sheet has good bending performance, and can better prevent the sheet from breaking when used for wine box packaging.

[0015] The powder nitrile rubber added in the glass fiber layer and the wear-resistant layer improves the toughness and bending resistance of the sheet, so that the transparent PET sheet has better flexibility and significantly enhanced anti-breaking capacity.

[0016] Further, the glass fiber layer and the wear-resistant layer are provided with a bending mechanism for assisting the bending of the PET sheet, the glass fiber layer and the wear-resistant layer have high hardness, and inner bending grooves and outer bending grooves are equidistantly arranged on surfaces of the glass fiber layer and the wear-resistant layer, so that the bending effect of the sheet is improved.

[0017] The inner bending grooves and the outer bending grooves are distributed in a staggered manner, and the distance between adjacent inner bending grooves is greater than the distance between adjacent outer bending grooves, so that the sheet is easy to bend.

[0018] Further, the elastic foaming layer is composed of an upper foaming layer, a middle foaming layer and a lower foaming layer, and the densities of the three layers are increased in sequence, so that the elastic foaming layer has good elastic performance and is easy to bend. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a UV coating structure diagram of the utility model.

[0020] Figure 2 It is a glass fiber layer structure diagram of the utility model.

[0021] Figure 3 It is a wear-resistant layer structure diagram of the utility model.

[0022] Figure 4 It is an inner bending groove structure diagram of the utility model.

[0023] Figure 5 It is an upper foaming layer structure diagram of the utility model.

[0024] In the drawing: 1, bottom layer; 2, elastic foaming layer; 21, upper foaming layer; 22, middle foaming layer; 23, lower foaming layer; 3, glass fiber layer; 4, wear-resistant layer; 5, UV coating; 6, outer bending groove; 7, inner bending groove; 8, arc-shaped corner. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Embodiment one: please refer to Figures 1-5The utility model provides following technical scheme: a kind of easy bending transparent PET sheet, including the bottom layer 1 for the innermost layer of packaging box, the surface of bottom layer 1 is connected with the elastic foamed layer 2 with buffering performance with composite, the surface of elastic foamed layer 2 is connected with glass fibre layer 3 with composite, glass fibre layer 3 surface is connected with wear layer 4 with the strength and stability of reinforcing material with composite, and wear layer 4 surface is provided with UV coating 5 of protective material from ultraviolet damage;Glass fibre layer 3 and wear layer 4 are provided with the bending mechanism of auxiliary PET sheet bending on it.

[0027] Glass fibre layer 3 and wear layer 4 are added with powder nitrile rubber that promotes the toughness and the powder nitrile rubber that bends performance of sheet.

[0028] Bending mechanism includes multiple outer bending grooves 6 that are equidistantly opened on wear layer 4.

[0029] Bending mechanism further includes multiple inner bending grooves 7 that are equidistantly opened on glass fibre layer 3.

[0030] The distance between adjacent inner bending grooves 7 is greater than the distance between adjacent outer bending grooves 6, and the inner bending grooves 7 and the outer bending grooves 6 are distributed in a staggered manner.

[0031] The two sides of the open end above the inner bending grooves 7 and the outer bending grooves 6 are provided with arc corners 8.

[0032] The transparent PET sheet body is prepared by composite of bottom layer 1, elastic foamed layer 2, glass fibre layer 3, wear layer 4 and UV coating 5, wherein the hardness of glass fibre layer 3 and wear layer 4 is higher, a plurality of inner bending grooves 7 are equidistantly opened on the surface of glass fibre layer 3, a plurality of outer bending grooves 6 are equidistantly opened on the surface of wear layer 4, the inner bending grooves 7 and the outer bending grooves 6 are distributed in a staggered manner, and the distance between adjacent inner bending grooves 7 is greater than the distance between adjacent outer bending grooves 6. When the PET sheet needs to be bent, the opening of the inner bending grooves 7 and the outer bending grooves 6 can facilitate the bending, making the PET sheet more flexible in application on wine box packaging.

[0033] Example two: based on example one, also discloses elastic foamed layer 2, and the specific structure is as follows: elastic foamed layer 2 includes upper foamed layer 21, middle foamed layer 22 and lower foamed layer 23; upper foamed layer 21 is connected on the surface of glass fibre layer 3, lower foamed layer 23 is connected on the surface of bottom layer 1, and middle foamed layer 22 is arranged between upper foamed layer 21 and lower foamed layer 23.

[0034] Upper foamed layer 21, middle foamed layer 22 and lower foamed layer 23 are prepared from polyethylene terephthalate, branching agent; the density of upper foamed layer 21, middle foamed layer 22 and lower foamed layer 23 increases in turn.

[0035] The elastic foamed layer 2 increases the softness and elasticity of the PET sheet, and provides better comfort and buffering performance, when preparing the elastic foamed layer 2, according to the density characteristics of the upper foamed layer 21, the middle foamed layer 22 and the lower foamed layer 23, a proper amount of branching agent is added in polyethylene terephthalate to control the density of the upper foamed layer 21, the middle foamed layer 22 and the lower foamed layer 23 to increase in turn, when the surface of the PET sheet on the wine box packaging is subjected to pressure, the elastic foamed layer 2 can bend to buffer the external force, avoiding the PET sheet from being broken under pressure.

[0036] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "link", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0037] Although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified, or part of the technical features can be replaced, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A flexible transparent PET sheet comprising a base layer (1) for the innermost layer of a packaging box, characterized in that: The bottom layer (1) is surface-composite connected with an elastic foaming layer (2) having a buffering performance, the elastic foaming layer (2) is surface-composite connected with a glass fiber layer (3), the glass fiber layer (3) is surface-composite connected with a wear-resistant layer (4) having strength and stability of reinforcing material, and the wear-resistant layer (4) is surface-provided with a UV coating (5) for protecting the material from ultraviolet damage. The glass fiber layer (3) and the wear-resistant layer (4) are provided with a bending mechanism for assisting the bending of the PET sheet.

2. A flexible transparent PET sheet according to claim 1, characterized in that: The glass fiber layer (3) and the wear-resistant layer (4) are both added with powdered nitrile rubber for improving the toughness and bending resistance of the sheet.

3. A flexible transparent PET sheet according to claim 1, characterized in that: The bending mechanism comprises a plurality of outer bending grooves (6) equally spaced on the wear-resistant layer (4).

4. A flexible transparent PET sheet according to claim 3, characterized in that: The bending mechanism further comprises a plurality of inner bending grooves (7) equally spaced on the glass fiber layer (3).

5. A flexible transparent PET sheet according to claim 4, characterized in that: The distance between adjacent inner bending grooves (7) is greater than the distance between adjacent outer bending grooves (6), and the inner bending grooves (7) and the outer bending grooves (6) are distributed in a staggered manner.

6. A pliable transparent PET sheet according to claim 5, characterized in that: The inner bending grooves (7) and the outer bending grooves (6) are both provided with arc corners (8) on both sides of the opening ends above them.

7. A flexible transparent PET sheet according to claim 1, characterized in that: The elastic foaming layer (2) comprises an upper foaming layer (21), a middle foaming layer (22) and a lower foaming layer (23). The upper foaming layer (21) is surface-composite connected with the glass fiber layer (3), the lower foaming layer (23) is surface-composite connected with the bottom layer (1), and the middle foaming layer (22) is surface-composite connected between the upper foaming layer (21) and the lower foaming layer (23).

8. A pliable transparent PET sheet according to claim 7, characterized in that: The upper foaming layer (21), the middle foaming layer (22) and the lower foaming layer (23) are prepared from polyethylene terephthalate and a branching agent. The densities of the upper foaming layer (21), the middle foaming layer (22) and the lower foaming layer (23) increase in sequence.

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