PVC label and preparation method thereof

Abstract

The present application relates to the technical field of label processing, especially to the field of IPC C08, and more particularly to a PVC label and a preparation method thereof.The PVC label comprises a substrate and a LOGO; the LOGO is prepared from 40-60 parts by weight of PVC resin, 40-60 parts by weight of plasticizer and 1-5 parts by weight of color powder.The present application selects specific LOGO raw materials and cooperates with a high-temperature treatment process to prepare a LOGO with good wear resistance, high color fastness and qualified color migration resistance, and the LOGO is combined with specific felt through a cold mold pressing process to form a PVC label.The label not only has good wear resistance and excellent color migration resistance, but also has good water washing resistance, so that the prepared PVC label can be applied in the fields of clothing, electronics, home appliances, automobiles and chemical industry, and is especially suitable for application in the field of clothing and can be used as a decoration in clothing.

Description

Technical Field

[0001] This invention relates to the field of label processing technology, particularly to the field of IPC C08, and more specifically, to a PVC label and its preparation method. Background Technology

[0002] In recent years, to enhance the appearance of clothing, manufacturers have often printed three-dimensional logos on garments. However, ordinary prints are easily washed off, and sewing the design onto the clothing with thread can affect its aesthetics. Therefore, people have begun to consider embossing the logo onto clothing. However, poor embossing can also cause the logo to peel off, and if the logo material is of poor quality, repeated washing can affect its color saturation, making the decorative logo look old.

[0003] Patent application CN202211052584.8 discloses a processing method for polyurethane fiber mesh or polyester fiber mesh with a patterned surface. It uses 100% solid content resin as the raw material for the surface adhesive layer between the pattern layer and the polyurethane fiber mesh or polyester fiber mesh, which has no solvent or other harmful substance volatilization, is environmentally friendly and has no VOC emissions, and improves the color brightness and fullness of the pattern layer of the polyurethane fiber mesh or polyester fiber mesh. However, it does not explore the water washability of the mesh.

[0004] Patent application CN202210542007.0 discloses the preparation and application method of printing ink anti-rubbing fastness improver. Although it can improve the waterproof and scratch-resistant effect of ink after printing curing, it does not explore its bonding performance with clothing materials. Summary of the Invention

[0005] To address the aforementioned problems, in a first aspect, the present invention provides a PVC label, the structure of which includes a substrate and a logo.

[0006] The logo, by weight, is made from 40-60 parts of PVC resin, 40-60 parts of plasticizer, and 1-5 parts of colorant.

[0007] Preferably, the degree of polymerization of the PVC resin is 1200-1800, the standard viscosity (B) is ≤7 Pa·s, and the residual vinyl chloride monomer content is ≤10 μg / g; more preferably, the degree of polymerization of the PVC resin is 1250-1650, the standard viscosity (B) is ≤5 Pa·s, and the residual vinyl chloride monomer content is ≤5 μg / g.

[0008] In some preferred embodiments, the PVC resin is purchased from Jiangsu Corning P440 powder sold by Yuanbida (Shaoxing) Chemical Products Co., Ltd.

[0009] Preferably, the plasticizer has a surface tension of 25-35 mN / m at 20°C and a kinetic viscosity of 30-80 mPa·s at 20°C; more preferably, the plasticizer has a surface tension of 28-32 mN / m at 20°C and a kinetic viscosity of 44-60 mPa·s at 20°C.

[0010] Preferably, the plasticizer is one or more of dibutyl phthalate, dioctyl terephthalate, dipropylene glycol dibenzoate, diethyl phthalate, and dioctyl adipate; more preferably, it is dioctyl terephthalate (DOTP).

[0011] In some preferred embodiments, the plasticizer is purchased from BASF DINCH environmentally friendly plasticizer sold by Yuanbida (Shaoxing) Chemical Products Co., Ltd.

[0012] Preferably, the weight ratio of the PVC resin to the plasticizer is 1:(0.8-1.5); more preferably, it is 1:1.

[0013] The inventors unexpectedly discovered that using a specific PVC resin as the raw material for preparing the logo could improve its abrasion resistance. However, the poor flowability of PVC resin affected its processability. The inventors creatively discovered that using a specific plasticizer as the raw material, and when the weight ratio of PVC resin to plasticizer was 1:(0.8-1.5), could ensure that the prepared logo had both good abrasion resistance and easy processing. This is likely due to the good compatibility between the specific plasticizer and PVC resin; its addition can reduce the intermolecular forces between the polymer molecules, thereby improving the processing performance of the PVC resin. Furthermore, it allows the prepared logo to fill the pits on the felt surface under specific cold molding conditions, reducing molding defects and ensuring good adhesion between the logo and the felt. This results in PVC labels that, when applied to clothing, possess both abrasion resistance and good washability, preventing the labels from easily falling off during washing and ensuring a firm bond. In addition, using non-phthalate plasticizers has certain environmental benefits.

[0014] There are no specific restrictions on the pigments used; any commercially available pigments are acceptable, and the color of the pigment can be selected according to product requirements.

[0015] The content of the pigment is 1-5 wt% of the total raw materials used to prepare the logo.

[0016] The inventors unexpectedly discovered that when the pigment content is 1-5 wt% of the total raw materials used in logo preparation, it can maximize the color saturation of PVC labels while preventing color migration. This is likely due to the synergistic effect between the raw materials, combined with specific high-temperature treatment, which ensures good compatibility between the pigment and other materials in the system, resulting in uniform dispersion within the system. Furthermore, specific plasticizers attract the pigment, preventing it from diffusing to the logo surface, thereby further reducing pigment migration and improving colorfastness.

[0017] Preferably, the substrate is felt.

[0018] Preferably, the thickness of the felt is 1-30 mm; more preferably, it is 2 mm.

[0019] The color of the felt is not specifically limited.

[0020] In some preferred embodiments, the felt is purchased from Shanghai Diedian Trading Co., Ltd. and is model 2MM / A08 / black felt.

[0021] A second aspect of the present invention provides a method for preparing the PVC label, comprising the following steps:

[0022] S1. Preparation of LOGO: After the PVC resin, plasticizer and color powder are mixed evenly, they are poured into the mold and the pre-formed LOGO is obtained by high temperature treatment.

[0023] S2. Preparation of PVC labels: The pre-formed logo is bonded to the felt placed in the mold, and then pressed together with a cold mold to obtain the PVC label.

[0024] Preferably, the specific implementation of the high-temperature treatment in step S1 is as follows: the mold is placed in a high temperature of 350-400℃ for 30-70 seconds.

[0025] More preferably, the placement time is 50 seconds.

[0026] Preferably, the specific implementation of the cold mold pressing in step S2 is as follows: pressing time 40-80s, cold mold pressure 40-60MPa.

[0027] More preferably, the pressing time is 50s and the cold mold pressure is 50MPa.

[0028] Beneficial effects:

[0029] 1. By selecting specific PVC resin as the raw material for preparing the logo, the wear resistance of the prepared logo can be improved.

[0030] 2. By selecting specific plasticizers as raw materials, and when the weight ratio of PVC resin to plasticizer is 1:(0.8-1.5), it is possible to ensure that the prepared logo has good wear resistance while also being easy to process.

[0031] 3. In this invention, the content of color powder is 1-5 wt% of the total raw materials used to prepare the logo, which can maximize the color saturation of the PVC label while also preventing color migration.

[0032] 4. This invention selects specific LOGO raw materials and combines them with a high-temperature treatment process to prepare LOGOs with good wear resistance, high color fastness, and qualified anti-color migration properties. These LOGOs are then pressed together with specific felt through a cold molding process to form PVC labels. These labels not only have good wear resistance and excellent anti-color migration properties, but also good water washing performance. This allows the prepared PVC labels to be used in clothing, electronics, home appliances, automobiles, chemicals and other fields. They are especially suitable for use in the clothing industry and can be used as decorative items on clothing. Detailed Implementation

[0033] Example

[0034] Example 1

[0035] Example 1 provides a PVC label, the structure of which includes a substrate and a logo.

[0036] The logo, by weight, is made from 50 parts PVC resin, 50 parts plasticizer, and 3 parts color powder.

[0037] The degree of polymerization of the PVC resin is 1250-1650, the standard viscosity (B) is ≤5 Pa·s, and the residual vinyl chloride monomer content is ≤5 μg / g.

[0038] The PVC resin was purchased from Jiangsu Corning P440 powder sold by Yuanbida (Shaoxing) Chemical Products Co., Ltd.

[0039] The plasticizer has a surface tension of 28-32 mN / m at 20°C and a kinetic viscosity of 44-60 mPa·s at 20°C.

[0040] The plasticizer is dioctyl terephthalate (DOTP).

[0041] The plasticizer was purchased from BASF DINCH environmentally friendly plasticizer sold by Yuanbida (Shaoxing) Chemical Products Co., Ltd.

[0042] The pigment was purchased from Shanghai Shengqi International Trade Co., Ltd.

[0043] The substrate is felt.

[0044] The thickness of the felt is 2 mm.

[0045] The felt was purchased from Shanghai Diedian Trading Co., Ltd. and was model 2MM / A08 / black felt.

[0046] The second aspect of this invention provides a method for preparing the PVC label, comprising the following steps:

[0047] S1. Preparation of LOGO: Mix PVC resin, plasticizer and color powder evenly and pour into mold. Place the mold in a high temperature of 380℃ for 50 seconds to obtain a pre-formed LOGO.

[0048] S2. Preparation of PVC label: The pre-formed logo is bonded to the felt placed in the mold, the pressing time is 60s, and the cold mold pressure is 50MPa to obtain the PVC label.

[0049] Example 2

[0050] Example 2 provides a PVC label, the specific implementation method is the same as that of Example 1, the difference being that: the LOGO, by weight, is made of 40 parts of PVC resin, 40 parts of plasticizer, and 1 part of color powder.

[0051] The method for preparing the PVC label comprises the following steps:

[0052] S1. Preparation of LOGO: Mix PVC resin, plasticizer and color powder evenly and pour into mold. Place the mold in a high temperature of 350℃ for 40 seconds to obtain a pre-formed LOGO.

[0053] S2. Preparation of PVC label: The pre-formed logo is bonded to the felt placed in the mold, the pressing time is 40s, and the cold mold pressure is 40MPa to obtain the PVC label.

[0054] Example 3

[0055] Example 3 provides a PVC label, the specific implementation method is the same as that of Example 1, the difference being that: the LOGO, by weight, is prepared from 60 parts of PVC resin, 60 parts of plasticizer, and 5 parts of color powder.

[0056] The method for preparing the PVC label comprises the following steps:

[0057] S1. Preparation of LOGO: Mix PVC resin, plasticizer and color powder evenly and pour into mold. Place the mold in a high temperature of 400℃ for 80 seconds to obtain a pre-formed LOGO.

[0058] S2. Preparation of PVC label: The preformed LOGO is bonded to the felt placed in the mold, and the pressing time is 80 s, and the cold mold pressure is 60 MPa to obtain the PVC label.

[0059] Performance testing method

[0060] 1. Color migration

[0061] For the PVC labels prepared in Examples 1-3 and Comparative Examples 1-3, after placing them under the conditions of 70 °C and 95% humidity for 48 h, observe whether they change color with a color card. If there is no color change, it means it is qualified, and the results are recorded in Table 1.

[0062] 2. Rubbing color fastness

[0063] For the PVC labels prepared in Examples 1-3 and Comparative Examples 1-3, refer to the method described in ISO105X12:2002 to conduct a rubbing color fastness test on the PVC labels. If the judged grade is ≥4, it is qualified, and the results are recorded in Table 1.

[0064] 3. Washability

[0065] For the PVC labels prepared in Examples 1-3 and Comparative Examples 1-3, refer to the method described in GB / T8629-2017. Measure the PVC label under the conditions of a water temperature of 40 °C and 500 revolutions of dehydration, wash it 5 times with 5A water, and observe whether the LOGO falls off. The results are recorded in Table 1.

[0066] Table 1

[0067] Color migration Color fastness to rubbing Water-resistant Example 1 qualified qualified Not detached Example 2 qualified qualified Not detached Example 3 qualified qualified Not detached

Claims

1. A PVC label, characterized in that, The structure comprises a substrate and a LOGO; The raw materials for preparing the LOGO comprise 40-60 parts of PVC resin, 40-60 parts of plasticizer and 1-5 parts of color powder by weight; The PVC resin has a polymerization degree of 1200-1800, a standard viscosity of ≤7 pa·s and a residual vinyl chloride monomer content of ≤10 μg / g; The plasticizer is dioctyl terephthalate, and has a surface tension of 25-35 mN / m at 20℃ and a dynamic viscosity of 30-80 mPa·s at 20℃; The weight ratio of the PVC resin to the plasticizer is 1:(0.8-1.5); The substrate is a felt, and the felt has a thickness of 1-30 mm; The preparation method of the PVC label comprises the following steps: S1, preparing the LOGO: uniformly mixing the PVC resin, the plasticizer and the color powder, pouring into a mold and obtaining a preformed LOGO mark through high-temperature treatment; S2, preparing the PVC label: laminating the preformed LOGO mark with the felt placed in the mold and obtaining the PVC label through cold mold pressing; The specific implementation of the high-temperature treatment in step S1 is placing the mold in high temperature of 350-400℃ for 30-70 s; The specific implementation of the cold mold pressing in step S2 is pressing for 40-80 s and cold mold pressure of 40-60 MPa.

2. A PVC label according to claim 1, characterized in that, The content of the color powder is 1-5 wt% of the total amount of the raw materials for preparing the LOGO.