A high-temperature resistant laminated label and its preparation method

Abstract

The present invention discloses a high-temperature resistant laminated label, which comprises a substrate layer, an adhesive layer, a pattern layer, and a laminated film layer. The adhesive layer uses a high-temperature resistant adhesive. The preparation raw materials of the high-temperature resistant adhesive, by weight, include: 18-22 parts of a block copolymer, 30-45 parts of a resin, 30-35 parts of a processing oil, and 0.5-2 parts of an auxiliary agent. The label prepared by the preparation method of the present invention has excellent high-temperature resistance, is suitable for application in high-temperature environments, and can prevent the label from separating from the main product, thus expanding the application field range of the label.

Description

Technical Field

[0001] The present invention relates to the field of labels, and particularly to a high-temperature resistant laminated label and a preparation method thereof. Background Art

[0002] Labels are used to mark the types or models of products, as well as other specific attributes, facilitating the search for the specific location of the required products by oneself and others, playing a certain role in identification and aesthetics. Even labels can serve as a display platform for brand images. During the preparation and use of labels, they are often affected by high temperatures, resulting in low product utilization rates.

[0003] Patent CN110379292A discloses a high-temperature resistant label, which is prepared by using a polyimide matrix layer, coating a high-temperature resistant surface layer, and combining an adhesive layer, thereby improving the high-temperature resistance of the label. However, during its use, the problem of the label separating from the main product easily occurs. Therefore, it is particularly important to prepare a product with high temperature resistance and high use stability. Summary of the Invention

[0004] The present application provides a high-temperature resistant laminated label, including a base material layer, an adhesive layer, a pattern layer, and a laminated film layer.

[0005] As a preferred technical solution, the base material layer is a label paper roll.

[0006] As a preferred technical solution, the adhesive layer uses a high-temperature resistant adhesive. The preparation raw materials of the high-temperature resistant adhesive are calculated by weight and include: 18-22 parts of block copolymer, 30-45 parts of resin, 30-35 parts of processing oil, and 0.5-2 parts of auxiliary agent.

[0007] Preferably, the block copolymer is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), and styrene-ethylene-butene-styrene block copolymer (SEBS).

[0008] Preferably, the block copolymer is a compound of styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS).

[0009] Preferably, the weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 8-10:1-2.

[0010] Preferably, the weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 9:1.5.

[0011] In the present invention application, the applicant prepares a high-temperature resistant adhesive using specific components to solve the problems of foaming, or curling and peeling after the product is affected by a high-temperature environment. In this system, the applicant has found that when using a blend of the block copolymers styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS), and the weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 8-10:1-2, the high-temperature resistance of the product can be better improved; this may be because the styrene-butadiene-styrene block copolymer (SBS) has a stronger cohesive force, and the adhesive prepared is more stable and high-temperature resistant after molding. However, using only the SBS block copolymer will cause the adhesive layer to become hard and brittle in the later stage, resulting in a decrease in adhesion. The applicant unexpectedly found that when a small amount of the SIS block copolymer is added in combination, the problem of hardness and brittleness can be improved and the adhesion can be increased, but the two must meet the weight ratio limit of the present invention, otherwise problems such as poor high-temperature resistance or insufficient adhesion will occur, resulting in problems such as foaming, curling or peeling of the label during use.

[0012] The S / B value of the styrene-butadiene-styrene block copolymer (SBS) is 20:80, the model is YH-796, and it is purchased from Shanghai Donghu Industry Co., Ltd.

[0013] The model of the styrene-isoprene-styrene block copolymer (SIS) is SIS-5566, and it is purchased from Hongji Plasticization Business in Zhangmutou, Dongguan City.

[0014] As a preferred technical solution, the resin is at least one of petroleum resin, rosin resin, and terpene resin.

[0015] Preferably, the resin is a blend of petroleum resin and rosin resin.

[0016] Preferably, the weight ratio of the petroleum resin to the rosin resin is 6-7:2-3.

[0017] Preferably, the weight ratio of the petroleum resin to the rosin resin is 6.5:2.5.

[0018] Preferably, the petroleum resin is C5 petroleum resin, the model is Escorez1315, and it is purchased from Hongji Plasticization Business in Zhangmutou, Dongguan City.

[0019] Preferably, the model of the rosin resin is SNR-100L, and it is purchased from Shangrao Sinan Resin Co., Ltd.

[0020] In the present invention application, the inventor uses a resin which is a compound of C5 petroleum resin and rosin resin, which can further improve the high-temperature resistance of the product. This may be because the C5 petroleum resin has a relatively high softening point and cohesion. When used in combination with the block copolymer in the system, it is beneficial to improve the viscosity and high-temperature resistance of the product. Moreover, by adding an appropriate amount of rosin resin, the compatibility of the system is improved, ensuring that the product does not foam or fall off under high-temperature conditions.

[0021] As a preferred technical solution, the processing oil is at least one of white oil, naphthenic oil, and aromatic oil.

[0022] Preferably, the processing oil is naphthenic oil, and the model of the naphthenic oil is KN-4010, which is purchased from Jinan Yuanfengda Petrochemical Co., Ltd.

[0023] As a preferred technical solution, the auxiliary agent is a compound of an antioxidant and a strengthening agent.

[0024] Preferably, the weight ratio of the antioxidant to the strengthening agent is 1:0.7 - 0.9.

[0025] Preferably, the weight ratio of the antioxidant to the strengthening agent is 1:0.8.

[0026] Preferably, the antioxidant is antioxidant 1010, which is purchased from Foshan Nanhai Chengxin Plastic Auxiliary Co., Ltd.

[0027] Preferably, the strengthening agent is nano-titanium dioxide, and the particle size of the nano-titanium dioxide is 5 - 20 nm.

[0028] Preferably, the particle size of the nano-titanium dioxide is 10 nm, the model is ZH-TiO210NR, and it is purchased from Hefei Zhonghang Nano Technology Development Co., Ltd.

[0029] In the present invention application, by adding an auxiliary agent which is a compound of an antioxidant and a strengthening agent, especially when the strengthening agent is nano-titanium dioxide with a particle size of 5 - 20 nm, it is well dispersed in the system, and relying on the special crystal structure of the nano-titanium dioxide itself, the high-temperature resistance of the product is improved.

[0030] As a preferred technical solution, the preparation method of the high-temperature resistant adhesive includes the following steps:

[0031] S1. Heat the processing oil to 110 - 130 °C and then add it to the block copolymer for melting to obtain a mixture a;

[0032] S2. Add the resin and the auxiliary agent to the mixture a and stir. Raise the temperature of the reaction device to 130 - 150 °C and react for 10 - 30 min to obtain the high-temperature resistant adhesive.

[0033] Preferably, the preparation method of the high-temperature resistant adhesive comprises the following steps:

[0034] S1. Heat the processing oil to 122 °C and then add it to the block copolymer for melting to obtain mixture a;

[0035] S2. Add the resin and additives to mixture a and stir, then raise the temperature of the reaction device to 139 °C and react for 120 min to obtain the high-temperature resistant adhesive.

[0036] As a preferred technical solution, the pattern layer is a label printing pattern.

[0037] The label printing pattern is a customer-defined pattern, without special limitations.

[0038] As a preferred technical solution, the material of the film coating layer is one of PVC, PP, and PET.

[0039] Preferably, the material of the film coating layer is PVC material.

[0040] On the other hand, the present invention provides a preparation method of a high-temperature resistant film-coated label, comprising the following steps:

[0041] By using an integrated molding printing machine, print the pattern layer on the substrate layer, and perform film coating on the pattern layer to form a film coating layer, and coat an adhesive layer and a release paper on the side of the substrate layer away from the pattern layer to prepare a high-temperature resistant film-coated label.

[0042] The present invention has the following beneficial effects: 1) By using a specific block copolymer in combination, the prepared high-temperature resistant adhesive avoids the problems of blistering or curling and peeling of the product under high-temperature conditions; 2) Using a resin which is a compound of C5 petroleum resin and rosin resin further improves the high-temperature resistance of the product; 3) By adding additives which are a compound of an antioxidant and a reinforcing agent, especially when the reinforcing agent selects nano-titanium dioxide with a particle size of 5-20 nm, the high-temperature resistance of the product is improved; 4) The label provided by the preparation method of the present invention has excellent high-temperature resistance, is suitable for application in high-temperature environments, and does not cause the problem of separation between the label and the main product, thereby expanding the application field range of the label. Specific Embodiments

[0043] Example 1

[0044] Example 1 of the present invention provides a high-temperature resistant film-coated label, comprising a substrate layer, an adhesive layer, a pattern layer, and a film coating layer.

[0045] The substrate layer is a label paper roll.

[0046] The adhesive layer uses a high-temperature resistant adhesive. The raw materials for preparing the high-temperature resistant adhesive are calculated by weight and include: 20 parts of block copolymer, 37 parts of resin, 32 parts of processing oil, and 1.2 parts of additives.

[0047] The block copolymer is a blend of styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS). The weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 9:1.5.

[0048] The S / B value of the styrene-butadiene-styrene block copolymer (SBS) is 20:80, and the model is YH-796, purchased from Shanghai Donghu Industry Co., Ltd.

[0049] The model of the styrene-isoprene-styrene block copolymer (SIS) is SIS-5566, purchased from Dongguan Zhangmutou Hongji Plastic Chemical Business.

[0050] The resin is a blend of petroleum resin and rosin resin. The weight ratio of the petroleum resin to the rosin resin is 6.5:2.5.

[0051] The petroleum resin is C5 petroleum resin, the model is Escorez1315, purchased from Dongguan Zhangmutou Hongji Plastic Chemical Business.

[0052] The model of the rosin resin is SNR-100L, purchased from Shangrao Sinan Resin Co., Ltd.

[0053] The processing oil is naphthenic oil, and the model of the naphthenic oil is KN-4010, purchased from Jinan Yuanfengda Petrochemical Co., Ltd.

[0054] The additives are a blend of antioxidant and enhancer. The weight ratio of the antioxidant to the enhancer is 1:0.8.

[0055] The antioxidant is antioxidant 1010, and the antioxidant 1010 is purchased from Foshan Nanhai Chengxin Plastic Additives Co., Ltd.

[0056] The enhancer is nano-titanium dioxide. The particle size of the nano-titanium dioxide is 10nm, the model is ZH-TiO210NR, purchased from Hefei Zhonghang Nano Technology Development Co., Ltd.

[0057] The preparation method of the high-temperature resistant adhesive includes the following steps:

[0058] S1. Heat the processing oil to 122 °C and then add it to the block copolymer for melting to obtain mixture a;

[0059] S2. Add resin and additives to mixture a and stir. Heat the reaction device to 139 °C and react for 120 min to obtain a high-temperature resistant adhesive.

[0060] The pattern layer is a label printing pattern.

[0061] The material of the film coating layer is PVC material.

[0062] On the other hand, this embodiment provides a preparation method of a high-temperature resistant film-coated label, including the following steps:

[0063] By using an integrated molding printing machine, print a pattern layer on the substrate layer, and perform film coating on the pattern layer to form a film coating layer, and coat an adhesive layer and a release paper on the side of the substrate layer away from the pattern layer to prepare a high-temperature resistant film-coated label.

[0064] Example 2

[0065] Embodiment 2 of the present invention provides a high-temperature resistant film-coated label. The specific implementation manner is the same as that of Embodiment 1, except that the adhesive layer uses a high-temperature resistant adhesive. The preparation raw materials of the high-temperature resistant adhesive include, by weight: 18 parts of block copolymer, 30 parts of resin, 30 parts of processing oil, and 0.5 part of additive.

[0066] The weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 8:1.

[0067] The weight ratio of the petroleum resin to the rosin resin is 6:2.

[0068] The weight ratio of the antioxidant to the enhancer is 1:0.7.

[0069] Example 3

[0070] Embodiment 3 of the present invention provides a high-temperature resistant film-coated label. The specific implementation manner is the same as that of Embodiment 1, except that the adhesive layer uses a high-temperature resistant adhesive. The preparation raw materials of the high-temperature resistant adhesive include, by weight: 22 parts of block copolymer, 45 parts of resin, 35 parts of processing oil, and 2 parts of additive.

[0071] The weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 10:2.

[0072] The weight ratio of the petroleum resin to the rosin resin is 7:3.

[0073] The weight ratio of the antioxidant to the enhancer is 1:0.9.

[0074] Comparative Example 1

[0075] Comparative Example 1 of the present invention provides a high-temperature resistant laminated label. The specific implementation is the same as that of Example 1, except that the styrene-isoprene-styrene block copolymer (SIS) is replaced with styrene-butadiene-styrene block copolymer (SBS) of the same weight.

[0076] Comparative Example 2

[0077] Comparative Example 2 of the present invention provides a high-temperature resistant laminated label. The specific implementation is the same as that of Example 1, except that the weight ratio of the styrene-butadiene-styrene block copolymer (SBS) to the styrene-isoprene-styrene block copolymer (SIS) is 9:5.

[0078] Comparative Example 3

[0079] Comparative Example 3 of the present invention provides a high-temperature resistant laminated label. The specific implementation is the same as that of Example 1, except that the weight ratio of the petroleum resin to the rosin resin is 2:7.

[0080] Comparative Example 4

[0081] Comparative Example 4 of the present invention provides a high-temperature resistant laminated label. The specific implementation is the same as that of Example 1, except that the particle size of the nano-titanium dioxide is 30 nm, the model is VK-T25T, and it is purchased from Jingrui New Materials Co., Ltd.

[0082] Performance Test

[0083] 1. High-temperature stability: Paste the high-temperature resistant laminated labels prepared in the examples and comparative examples on plastic bottles, place them in a heating box at 60 °C for 48 h, and evaluate the high-temperature stability performance of the labels based on the appearance state of the labels. It is divided into four grades. Grade A means no change in appearance; Grade B means slight blistering appears on the appearance, and the average diameter of the bubbles is less than or equal to 1 mm; Grade C means large bubbles appear on the appearance, and the average diameter of the bubbles is greater than 1 mm; Grade D means the label falls off. Among them, Grade A has the best high-temperature stability performance.

[0084] 2. Peel strength: Refer to Standard GB / T2792 to test the peel strength with a stainless steel plate under the condition of 180°, and the higher the peel strength, the better the adhesion.

[0085] The test results are shown in Table 1.

[0086] Table 1

[0087] High-temperature stability Peeling strength (N / 25mm) Example 1 A 45 Example 2 A 43 Example 3 A 42 Comparative Example 1 B 36 Comparative Example 2 B 35 Comparative Example 3 B 35 Comparative Example 4 C 28

Claims

1. A high temperature resistant film label, It is characterized in that It includes a base material layer, an adhesive layer, a pattern layer and a coating layer; The adhesive layer adopts a high temperature resistant adhesive, and the raw materials for preparing the high temperature resistant adhesive include, by weight: 18-22 parts of block copolymer, 30-45 parts of resin, 30-35 parts of processing oil, and 0.5-2 parts of additives; The block copolymer is a compound of styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS) in a weight ratio of 8-10:1-2; The resin is a compound of petroleum resin and rosin resin in a weight ratio of 6-7:2-3; The auxiliary agent is a compound of an antioxidant and a reinforcing agent in a weight ratio of 1:0.7-0.9; the antioxidant is antioxidant 1010; the reinforcing agent is nano titanium dioxide, and the particle size of the nano titanium dioxide is 5-20nm.

2. A high temperature resistant film-coated label as claimed in claim 1, It is characterized in that The substrate layer is a label paper roll.

3. A high temperature resistant film-coated label as claimed in claim 1, It is characterized in that The processing oil is at least one of white oil, naphthenic oil and aromatic oil.

4. A high temperature resistant film-coated label as claimed in claim 1, It is characterized in that The preparation method of the high temperature resistant adhesive comprises the following steps: S1. The process oil is heated to 110-130°C and then added to the block copolymer for melting to obtain a mixture a; S2. Add the resin and the additive to the mixture a and stir, heat the reaction device to 130-150° C. and react for 10-30 minutes to obtain a high temperature resistant adhesive.

5. A high temperature resistant film-coated label as claimed in claim 1, It is characterized in that The material of the coating layer is one of PVC, PP and PET.

6. A method for preparing a high temperature resistant film-coated label according to any one of claims 1 to 5, It is characterized in that The following steps are involved: By using an integrated molding printer, a pattern layer is printed on a substrate layer, and a film is laminated on the pattern layer to form a laminated layer, and an adhesive layer and a release paper are coated on the side of the substrate layer away from the pattern layer to prepare a high temperature resistant laminated label.