A type of foam with easily peelable film by hand

Abstract

This utility model discloses a foam with an easily peelable tear-off film, aiming to solve the problems of difficult waste cleaning, easy breakage and loss of sheets in the traditional processing of foam with tear-off film, as well as the difficulty in peeling off the tear-off part and the need to prepare multiple raw materials. The foam includes a single-sided adhesive, a foam product layer, double-sided adhesive, and a tear-off film. The single-sided adhesive is ultra-thin (0.005-0.01mm) and adheres to the foam product layer on the adhesive side. The double-sided adhesive adheres to the foam product layer on one side and a release film on the other. The tear-off film is larger than the foam and has a slightly adhesive contact surface for easy peeling. The foam and its central holes are rounded rectangles, with the foam side length being 0.5-3 times the hole side length. The foam is cut using a first-stage die, the tear-off part is cut using a second-stage die, and the final part is shaped using a third-stage die. During cutting, a process auxiliary film consisting of a process adhesive film and a process release film assists. This design can ignore batch differences on the surface of the foam product layer, using a single adhesive silicone film for processing, avoiding material stagnation and expiration, and improving production efficiency and user experience.

Description

Technical Field

[0001] This utility model belongs to the field of die-cutting and relates to a foam with an easily peelable tear-off film. Background Technology

[0002] There are many problems that need to be solved in the processing and use of sealing and support foam products with tear-off film, as follows: During the use stage, two typical defects are prone to occur when peeling off the tear-off film: first, the foam is easily damaged, and second, the tear-off area is difficult to peel off, which seriously affects the user experience and product performance.

[0003] The problems in the processing stage are more prominent: a) Waste areas in the product area are difficult to clean thoroughly, and foam residue remains at the tear-off points, affecting the operator's use and potentially causing poor sealing of electronic equipment, posing a risk of functional failure; b) Due to the foaming characteristics of foam materials, the surface state of different batches of products varies significantly due to factors such as ambient temperature and chemical composition, such as uneven color, fluctuating surface roughness, and irregular distribution of foam pores. This leads to easy damage to the foam surface and poor adhesion to the substrate during die-cutting, resulting in lost sheets, making material matching extremely difficult; c) The choice of adhesiveness for the tear-off film is limited. A single adhesive type of tear-off film cannot meet the processing needs of diverse products. Multiple adhesive types of tear-off film need to be stocked in advance during production, which increases inventory costs and reduces production flexibility.

[0004] These issues collectively restrict the quality stability and production efficiency of foam products with tear-off film, and urgently require optimization through technological improvements. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a foam with easily peelable tear-off film. This invention effectively solves the problems that arise when peeling foam with tear-off sections.

[0006] To achieve the above objectives, this utility model provides the following technical solution: One of the technical solutions of this utility model is to provide a foam with an easily peelable release film, the foam comprising: a single-sided adhesive, a foam product layer, and a double-sided adhesive; the adhesive side of the single-sided adhesive is attached to the foam product layer, the first side of the double-sided adhesive is attached to the foam product layer, and a release film is attached to the second side of the double-sided adhesive.

[0007] Furthermore, the foam also has a tear-off film, which is larger than the foam and has a tear-off area for peeling. The side of the tear-off film that contacts the single-sided adhesive has slight tackiness.

[0008] Furthermore, the thickness of the single-sided adhesive is 0.005-0.01 mm.

[0009] Furthermore, the single-sided adhesive is a silicone film with a single adhesive property.

[0010] Furthermore, the foam has holes, and the shape of the holes and the shape of the foam are both rounded rectangles; the side length of the foam is 0.5-3 times the side length of the holes.

[0011] Furthermore, the foam is sequentially cut using a first-order die, a second-order die, and a third-order die. The first-order die is used to cut and form holes in the foam. The second-order die is used to cut and form tear-off sections. The third-order die is used to cut and form the final individual product.

[0012] Furthermore, in the cutting process, a process auxiliary film is used to assist the cutting. The process auxiliary film includes a process adhesive film and a process release film. The process adhesive film is placed on the side of the hand-tearable film that does not contact the single-sided adhesive. The process release film is placed on the second side of the double-sided adhesive.

[0013] Compared with the prior art, the present invention has at least the following improvements and beneficial effects: This invention addresses a series of problems caused by batch-to-batch variations in the surface of foam products (such as uneven color, roughness fluctuations, and irregular pore distribution) by adding an ultra-thin single-sided adhesive layer to the surface of the foam product layer. It effectively prevents breakage and missing sheets during processing, while thoroughly cleaning residues from both product and waste areas, ensuring processing cleanliness. Specific advantages are as follows: (1) Even if there are batch-to-batch differences in the surface of the foam product layer, it will not affect the compatibility of the product with the hand-tear processing, ensuring the stability of the processing flow; (2) Thanks to the high consistency and small difference of the surface state of the ultra-thin single-sided adhesive, only a single adhesive silicone film is needed to complete the product processing and manufacturing smoothly without the need for frequent adjustment of the matching materials; (3) There is no need to purchase and store multiple types of raw materials for backup, which fundamentally solves the problem of stagnation and expiration of materials due to long-term idleness, reduces inventory costs, and improves production flexibility. Attached Figure Description

[0014] Figure 1 The structure of foam with a tear-off membrane in the prior art; Figure 2 The structure of the foam with easily peelable tear-off membrane provided by this utility model; Figure 3 This is a schematic diagram of a die-cutting mold; where A is the first-order die-cutting mold, B is the second-order die-cutting mold, and C is the third-order die-cutting mold. Figure 4 This is a schematic diagram of die-cutting technology in the prior art; Figure 5 This is a schematic diagram of the die-cutting process of this utility model; Figure label: 1. Tear-off film, 2. Foam product layer, 3. Double-sided adhesive, 4. Single-sided adhesive; 5. Process auxiliary membranes, including: 5-1 process adhesive membrane and 5-2 process release membrane. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to specific embodiments. It should be noted that the following embodiments will help those skilled in the art to further understand this utility model, but do not limit this utility model in any way. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model. These all fall within the protection scope of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] Example 1: A foam with easily peelable film by hand like Figure 2 As shown, the foam provided in this embodiment has a three-layer structure, comprising, from top to bottom: single-sided adhesive 4, foam product layer 2, and double-sided adhesive 3; the adhesive side of the single-sided adhesive 4 is attached to the foam product layer 2, the first side of the double-sided adhesive 3 is attached to the foam product layer 2, and a release film is attached to the second side of the double-sided adhesive 3. In other words, single-sided adhesive 4 and double-sided adhesive 3 are respectively attached to the two sides of the foam product layer 2.

[0018] The foam is also provided with a tear-off membrane 1, which is larger than the size of the foam and has a tear-off area for tearing and peeling.

[0019] The single-sided adhesive 4 is an ultra-thin single-sided adhesive with a thickness of 0.01mm, which is tightly bonded to the foam product layer 2.

[0020] The side of the tear-off film (1) that contacts the single-sided adhesive 4 has a slight adhesiveness, which makes it so that when not in use, the tear-off film (1) and the single-sided adhesive 4 are stuck together and the tear-off film 1 will not be peeled off; when in use, it is easy to tear the tear-off film (1) and the single-sided adhesive 4 apart, and the two will not stick together and will not damage the structure of the single-sided adhesive 3 and the foam product layer 2.

[0021] The single-sided adhesive 4, foam product layer 2, and double-sided adhesive 3 of the foam are rounded rectangular structures with a hole in the middle. The shape of the hole is either a rounded rectangle or a rectangle. The diameter of the rounded corners of the foam and the rounded corners of the hole can be equal or unequal. The size of the hole (e.g., the side length) is smaller than the size of the rounded rectangle. In this embodiment, the side length of the foam is twice the side length of the hole.

[0022] The aforementioned type of easily peelable foam with a tear-off membrane is made by a series of die-cutting molds (such as...). Figure 3 As shown in A), the second-order die (as shown in A) Figure 3 As shown in B), three-stage die-cutting mold (as shown in B) Figure 3 It is cut sequentially as shown in C.

[0023] The first-stage die is used to cut and form holes in the foam, with the shape being an array of rounded rectangles or rectangles. The second-stage die is used to cut and form tear-off sections, with the shape being alternating straight lines and wavy lines. The third-stage die is used to cut and form the final individual product, with the shape of the tear-off section.

[0024] During the cutting process, a process assistance membrane 5 is used to assist in the cutting. The process assistance membrane 5 includes a process adhesive membrane 5-1 and a process release membrane 5-2.

[0025] The process adhesive film 5-1 is placed on the side of the hand-tearable film 1 that does not contact the single-sided adhesive 4 (e.g., Figure 5 (As shown); the release film 5-2 is placed on the second side of the double-sided adhesive 3.

[0026] In this embodiment, the use of single-sided adhesive 4 during foam manufacturing effectively solves the problem of tearing and damage caused by large batch differences in the foam product layer 2.

[0027] Comparative Example 1: A foam with a tear-off membrane like Figure 1 and Figure 4 As shown, the foam provided in Comparative Example 1 does not have single-sided adhesive 4 compared to the foam provided in Example 1.

[0028] This difference has two main drawbacks: On the one hand, during product manufacturing, due to the differences between the two batches of foam product layers, it may be necessary to frequently change the weight of the tear-off film 1 in order to avoid waste residue on the tear-off film 1 when discharging waste (including hole waste and foam residue at the handle).

[0029] On the other hand, when the product is used, since it does not contain single-sided adhesive 4, the foam product layer 2 is in direct contact with the tear-off film 1. As mentioned above, the contact surface between the tear-off film 1 and the foam product layer 2 (the contact surface between the tear-off film 1 and the single-sided adhesive 4 in Example 1) has slight adhesion. This adhesion will not damage the structure of the single-sided adhesive 4, but it poses a great risk of adhesion and damage to the foam product layer 2.

[0030] In summary, Embodiment 1 of this utility model provides a foam with an easily peelable tear-off film. Through innovative structural design and optimized processing technology, it effectively solves multiple pain points in the production and use of traditional foam with tear-off film. Structurally, this foam uses the foam product layer as its core, with ultra-thin single-sided adhesive and double-sided adhesive laminated on the top and bottom respectively. The thickness of the single-sided adhesive is precisely controlled within the design range of 0.005-0.01mm, which can not only fill the surface irregularity problem of the foam product layer caused by batch differences, but also provide a stable bonding interface for the tear-off film. At the same time, the tear-off film, which is larger than the foam body and has a slightly sticky contact surface, can achieve the effect of "firmly bonded when not in use and easily peeled off when in use", avoiding foam damage or adhesion.

[0031] Compared with traditional foams without single-sided adhesive, the foam of Example 1 does not require frequent changes to the tear-off film 1 model to adapt to different batches of foam. It can be processed using only single-sided adhesive 4, which greatly reduces the risk of inventory stagnation and material expiration and improves production flexibility. During use, the tear-off film 1 can be easily peeled off through the tear-off point without damaging the structure and performance of the foam product layer 2, single-sided adhesive 4 or double-sided adhesive 3, ensuring the sealing effect and functional stability in electronic devices and other application scenarios, combining practicality and economy.

[0032] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A type of foam with an easily peelable, tear-off film, characterized in that, The foam includes: single-sided adhesive (4), foam product layer (2) and double-sided adhesive (3); the adhesive side of the single-sided adhesive (4) is attached to the foam product layer (2), the first side of the double-sided adhesive (3) is attached to the foam product layer (2), and a release film is attached to the second side of the double-sided adhesive (3).

2. The foam with easily peelable tear-off film according to claim 1, characterized in that, The foam also has a tear-off film (1), which is larger than the size of the foam and has a tear-off area for peeling.

3. The foam with easily peelable tear-off film according to claim 2, characterized in that, The side of the tear-off film (1) that contacts the single-sided adhesive (4) has slight stickiness.

4. The foam with easily peelable tear-off film according to claim 1, characterized in that, The thickness of the single-sided adhesive (4) is 0.005-0.01 mm.

5. The foam with easily peelable tear-off film according to claim 1, characterized in that, The foam has holes, and the shape of the holes and the foam are both rounded rectangles; the side length of the foam is 0.5-3 times the side length of the holes.

6. The foam with easily peelable tear-off film according to claim 1, characterized in that, The foam is cut sequentially by a first-order die, a second-order die, and a third-order die.

7. The foam with easily peelable tear-off film according to claim 6, characterized in that, The first-order die is used to cut and form holes in the foam.

8. The foam with easily peelable tear-off film according to claim 7, characterized in that, The second-order die is used to cut and form the hand-tearable position.

9. A foam with easily peelable tear-off film according to claim 8, characterized in that, The three-stage die is used to cut and form the final individual product.

10. A foam with easily peelable tear-off film according to claim 9, characterized in that, During the cutting process, a process auxiliary film (5) is used to assist the cutting. The process auxiliary film (5) includes a process adhesive film (5-1) and a process release film (5-2). The process adhesive film (5-1) is placed on the side of the hand-tearable film (1) that does not contact the single-sided adhesive (4). The process release film (5-2) is placed on the second side of the double-sided adhesive (3).

Images