Antistatic coating transfer matt film and method for manufacturing the same

Abstract

The application discloses an antistatic coating transfer extinction film, which is composed of a lower surface layer, a sub-lower surface layer, a core layer and an upper surface layer in sequence, the lower surface layer and the sub-lower surface layer are antistatic extinction transfer layers, and the upper surface layer is an anti-adhesion layer; the anti-adhesion layer comprises the following raw materials: anti-adhesion master batch and homopolymerized polypropylene; the core layer comprises the following raw materials: homopolymerized polypropylene and antistatic master batch; the antistatic extinction transfer layer comprises the following raw materials: extinction transfer material, antistatic master batch and slip master batch; the antistatic master batch comprises the following raw materials: copolymerized polypropylene and antistatic agent; and the melt index of the antistatic master batch under the standard test of 230 DEG C / 2.16KG is 60.0-70.0 g / 10 min. The antistatic coating transfer extinction film has the advantages of low static electricity, uniform thickness, stable extinction effect and good transfer effect, and can be used for coating transfer of household and office supplies such as leather, textiles, boards and electric appliance housings.

Description

Technical Field

[0001] This invention relates to the field of functional thin film technology, and in particular to an antistatic coating transfer matte film and its preparation method. Background Technology

[0002] BOPP matte transfer film is a functional film suitable for textile printing transfer and printing processes. The product features high haze, low gloss, excellent diffuse reflection matte effect, good ink absorption, and superior transfer performance. Unlike traditional film processing methods, this product does not require a release layer; ink or hot stamping can be applied directly. Patterns and designs are completely transferred to fabrics, leather, and other materials through heat and pressure, improving the finished product's appearance. The product is widely used in the transfer printing and hot stamping industries of textiles, leather, imitation leather, elastic fabrics, and bags, and has broad market potential.

[0003] The existing BOPP matte transfer film production process suffers from high static electricity due to friction and other reasons, which reduces the surface energy of the film and leads to problems such as poor coating transfer and incomplete peeling after transfer. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes an antistatic coating transfer matte film and its preparation method, which solves the problems of poor transfer and incomplete peeling caused by high static electricity and other reasons.

[0005] The present invention proposes an antistatic coating transfer matting film, which is composed of a lower surface layer, a second lower surface layer, a core layer, and an upper surface layer in sequence. The lower surface layer and the second lower surface layer are antistatic matting transfer layers, and the upper surface layer is an anti-sticking layer.

[0006] The anti-adhesion layer comprises the following raw materials: anti-adhesion masterbatch and homopolymer polypropylene;

[0007] The core layer comprises the following raw materials: homopolymer polypropylene and antistatic masterbatch;

[0008] The antistatic matte transfer layer comprises the following raw materials: matte transfer material, antistatic masterbatch, and slip masterbatch;

[0009] The antistatic masterbatch comprises the following raw materials: copolymer polypropylene and antistatic agent; the melt flow index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 60.0~70.0g / 10min.

[0010] Preferably, the antistatic agent is composed of nonionic glycerol fatty acid esters, acid amines and their derivatives in a mass ratio of 1:(0.8-2).

[0011] Preferably, the antistatic masterbatch comprises the following raw materials in the following mass percentages: 55-65% copolymer polypropylene and 35-45% antistatic agent.

[0012] Preferably, the anti-stick layer comprises the following raw materials in weight percentages: 2-5% anti-stick masterbatch and 95-98% homopolymer polypropylene; the core layer comprises the following raw materials in weight percentages: 97-99% homopolymer polypropylene and 1-3% antistatic masterbatch; the antistatic matte transfer layer comprises the following raw materials in weight percentages: 0.1-0.5% antistatic masterbatch, 0.5-2% slip masterbatch, and the balance being matte transfer material.

[0013] Preferably, the matting transfer material comprises the following raw materials in the following mass percentages: 20-30% matting agent, 6-10% compatibilizer, 0.1-0.3% antioxidant, and the balance being a binary copolymer polypropylene; the melt flow index of the matting transfer material at 230℃ / 2.16KG standard test is 3.0-5.0g / 10min.

[0014] Among them, the binary copolymer polypropylene is made by copolymerizing ethylene and propylene.

[0015] Preferably, the antioxidant is a hindered phenolic antioxidant, a phosphite antioxidant, or a combination thereof. Preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 1076, and antioxidant 168.

[0016] Preferably, the compatibilizer is linear low-density polyethylene (LLDPE).

[0017] Preferably, the matting agent is high-density polyethylene (HDPE).

[0018] Preferably, the slip masterbatch comprises the following raw materials in the following mass percentages: 80-90% homopolymer polypropylene and 10-20% slip agent; the slip masterbatch has a melt index of 15-20.0 g / 10 min at a standard test of 230℃ / 2.16KG.

[0019] Preferably, the anti-sticking masterbatch comprises the following raw materials in the following mass percentages: 94-96% homopolymer polypropylene and 4-6% synthetic silica; the melt flow index of the anti-sticking masterbatch at 230℃ / 2.16KG standard test is 4.0-9.0g / 10min.

[0020] Preferably, the synthetic silica-like material is an irregularly shaped sphere with a particle size of 4–6 μm.

[0021] Preferably, the sum of the thicknesses of the lower surface layer and the next lower surface layer is 2.0–2.5 μm, the thickness of the core layer is 18–19.5 μm, and the thickness of the upper surface layer is 0.8–1.5 μm.

[0022] Preferably, the sum of the thicknesses of the lower surface layer and the next lower surface layer is 2.0–2.3 μm, the thickness of the core layer is 18.5–19.1 μm, and the thickness of the upper surface layer is 0.8–1.1 μm.

[0023] A method for preparing the antistatic coating transfer matte film includes the following steps: adding the raw materials of the lower surface layer, the second lower surface layer and the upper surface layer to three auxiliary extruders respectively, adding the raw material of the core layer to the main extruder, heating and melting, then co-extruding through a die head, cooling through a quench roll to form a casting sheet, stretching the casting sheet longitudinally, then preheating, stretching laterally, shaping, and cooling to obtain the final product.

[0024] Preferably, the heating and melting temperature of the lower surface layer and the next lower surface layer is 220-225°C, the heating and melting temperature of the core layer is 250-260°C, and the heating and melting temperature of the upper surface layer is 235-245°C.

[0025] Preferably, the longitudinal stretching has a stretching ratio of 4.8 to 5.1 and a temperature of 110 to 125°C.

[0026] Preferably, the temperature for the transverse stretching is 155–180°C.

[0027] The beneficial effects of this invention are as follows:

[0028] Static electricity generated on the master roll during the stretching and winding process of matte transfer films reduces the surface energy of the film, easily leading to poor transfer performance. This invention incorporates a high-efficiency, high-flow-rate antistatic masterbatch into the core layer and matte transfer layer. This high efficiency and high flow-rate allow the antistatic agent to disperse more evenly during the melt flow process, better dispersing accumulated charges. This enables faster elimination of static electricity generated during film stretching and winding, and prevents static stains, thereby achieving better coating transfer performance.

[0029] The present invention also selects a reasonable anti-adhesion masterbatch. The anti-adhesion masterbatch in the upper surface material uses synthetic silica with irregular and slightly rounded edges, which not only prevents the film from sticking but also avoids scratching the film and thus avoiding damage to the transfer layer.

[0030] The antistatic coating transfer matting film of the present invention also has the advantages of reasonable and uniform matting transfer layer thickness and good matting effect, thus having both good matting effect and good transfer effect.

[0031] In summary, the antistatic coating transfer matting film of the present invention has the advantages of low static electricity, uniform thickness, stable matting effect, and good transfer effect, and can be used for coating transfer of household and office products such as leather, textiles, boards, and appliance housings. Detailed Implementation

[0032] The technical solution of the present invention will now be described in detail through specific embodiments.

[0033] Example 1

[0034] An antistatic coating transfer matting film is composed of a lower surface layer, a second lower surface layer, a core layer, and an upper surface layer, wherein the lower surface layer and the second lower surface layer are antistatic matting transfer layers, and the upper surface layer is an anti-sticking layer.

[0035] The anti-stick layer comprises the following raw materials in the following weight percentages: 2.5% anti-stick masterbatch and 97.5% homopolymer polypropylene;

[0036] The core layer comprises the following raw materials: 99% homopolymer polypropylene and 1% antistatic masterbatch;

[0037] The next lower layer is an antistatic matte transfer layer, comprising the following raw materials: 0.1% antistatic masterbatch, 0.5% slip masterbatch, and the remainder being matte transfer material. The raw materials for the lower surface layer are the same as those for the next lower layer.

[0038] The antistatic masterbatch comprises the following raw materials in the following mass percentages: 55% copolymer polypropylene and 45% antistatic agent; the melt index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 65.04g / 10min; the antistatic agent is composed of monoglyceride fatty acid ester and oleic acid amide in a mass ratio of 1:1.

[0039] The matting transfer material comprises the following raw materials by weight percentage: 25% matting agent, 9.8% compatibilizer, 0.2% antioxidant, and the balance being a binary copolymer polypropylene; the binary copolymer polypropylene is copolymerized from ethylene and propylene, the antioxidant is antioxidant 168, the compatibilizer is linear low-density polyethylene, and the matting agent is high-density polyethylene; the melt flow index of the matting transfer material at 230℃ / 2.16KG standard test is 3.64g / 10min.

[0040] The slip masterbatch comprises the following raw materials in the following mass percentages: 80% homopolymer polypropylene and 20% slip agent; the slip agent is erucamide; the melt index of the slip masterbatch at 230℃ / 2.16KG standard test is 18.65g / 10min.

[0041] The anti-sticking masterbatch comprises the following raw materials by mass percentage: 96% homopolymer polypropylene and 4% synthetic silica; the synthetic silica is irregularly shaped spherical with a particle size of 5μm; the melt flow index of the anti-sticking masterbatch at 230℃ / 2.16KG standard test is 6.48g / 10min.

[0042] The thickness of the lower surface layer is 1 μm, the thickness of the core layer is 18 μm, and the thickness of the upper surface layer is 1 μm.

[0043] Preparation of antistatic coating transfer matte film: The raw materials for the lower surface layer, the second lower surface layer, and the upper surface layer are respectively added to three auxiliary extruders, while the raw material for the core layer is added to the main extruder. The mixture is heated and melted, then co-extruded through a die, cooled by a quench roll to form a cast sheet. The cast sheet is then longitudinally stretched, preheated, transversely stretched, shaped, and cooled to obtain the final product. The heating and melting temperatures for the lower and second lower surface layers are 220–225℃, for the core layer 250–260℃, and for the upper surface layer 235–245℃. The longitudinal stretching ratio is 4.8–5.1, and the temperature is 110–125℃. The transverse stretching temperature is 155–180℃.

[0044] Example 2

[0045] An antistatic coating transfer matting film is composed of a lower surface layer, a second lower surface layer, a core layer, and an upper surface layer, wherein the lower surface layer and the second lower surface layer are antistatic matting transfer layers, and the upper surface layer is an anti-sticking layer.

[0046] The anti-stick layer comprises the following raw materials by weight percentage: 2% anti-stick masterbatch and 98% homopolymer polypropylene;

[0047] The core layer comprises the following raw materials: 98.5% homopolymer polypropylene and 1.5% antistatic masterbatch;

[0048] The next lower layer is an antistatic matte transfer layer, comprising the following raw materials: 0.15% antistatic masterbatch, 0.5% slip masterbatch, and the remainder being matte transfer material. The raw materials for the lower surface layer are the same as those for the next lower layer.

[0049] The antistatic masterbatch comprises the following raw materials in the following mass percentages: 55% copolymer polypropylene and 45% antistatic agent; the melt index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 65.04g / 10min; the antistatic agent is composed of monoglyceride fatty acid ester and oleic acid amide in a mass ratio of 1:0.8.

[0050] The matting transfer material comprises the following raw materials by weight percentage: 26% matting agent, 9.8% compatibilizer, 0.2% antioxidant, and the balance being a binary copolymer polypropylene; the binary copolymer polypropylene is copolymerized from ethylene and propylene, the antioxidant is antioxidant 168, the compatibilizer is linear low-density polyethylene, and the matting agent is high-density polyethylene; the melt flow index of the matting transfer material at 230℃ / 2.16KG standard test is 3.78g / 10min.

[0051] The slip masterbatch comprises the following raw materials in the following mass percentages: 80% homopolymer polypropylene and 20% slip agent; the slip agent is erucamide; the melt index of the slip masterbatch at 230℃ / 2.16KG standard test is 18.49g / 10min.

[0052] The anti-sticking masterbatch comprises the following raw materials in the following mass percentages: 95% homopolymer polypropylene and 5% synthetic silica; the synthetic silica is irregularly shaped spherical with a particle size of 5μm; the melt flow index of the anti-sticking masterbatch at 230℃ / 2.16KG standard test is 8.01g / 10min.

[0053] The thickness of the lower surface layer is 1 μm, the thickness of the core layer is 18.8 μm, and the thickness of the upper surface layer is 1 μm.

[0054] The preparation method of the antistatic coating transfer matte film is the same as in Example 1.

[0055] Example 3

[0056] An antistatic coating transfer matting film is composed of a lower surface layer, a second lower surface layer, a core layer, and an upper surface layer, wherein the lower surface layer and the second lower surface layer are antistatic matting transfer layers, and the upper surface layer is an anti-sticking layer.

[0057] The anti-stick layer comprises the following raw materials in the following weight percentages: 2.5% anti-stick masterbatch and 97.5% homopolymer polypropylene;

[0058] The core layer comprises the following raw materials: 98% homopolymer polypropylene and 2% antistatic masterbatch;

[0059] The next lower layer is an antistatic matte transfer layer, comprising the following raw materials: 0.2% antistatic masterbatch, 0.6% slip masterbatch, and the remainder being matte transfer material. The raw materials for the lower surface layer are the same as those for the next lower layer.

[0060] The antistatic masterbatch comprises the following raw materials in the following mass percentages: 55% copolymer polypropylene and 45% antistatic agent; the melt index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 65.04g / 10min; the antistatic agent is composed of monoglyceride fatty acid ester and oleic acid amide in a mass ratio of 1:2.

[0061] The matting transfer material comprises the following raw materials by weight percentage: 30% matting agent, 9.8% compatibilizer, 0.2% antioxidant, and the balance being a binary copolymer polypropylene; the binary copolymer polypropylene is copolymerized from ethylene and propylene, the antioxidant is antioxidant 168, the compatibilizer is linear low-density polyethylene, and the matting agent is high-density polyethylene; the melt flow index of the matting transfer material at 230℃ / 2.16KG standard test is 3.65g / 10min.

[0062] The slip masterbatch comprises the following raw materials in the following mass percentages: 80% homopolymer polypropylene and 20% slip agent; the slip agent is erucamide; the melt index of the slip masterbatch at 230℃ / 2.16KG standard test is 18.49g / 10min.

[0063] The anti-sticking masterbatch comprises the following raw materials in the following mass percentages: 95% homopolymer polypropylene and 5% synthetic silica; the synthetic silica is irregularly shaped spherical with a particle size of 5μm; the melt flow index of the anti-sticking masterbatch at 230℃ / 2.16KG standard test is 8.01g / 10min.

[0064] The thickness of the lower surface layer is 1.15 μm, the thickness of the core layer is 18.7 μm, and the thickness of the upper surface layer is 1 μm.

[0065] The preparation method of the antistatic coating transfer matte film is the same as in Example 1.

[0066] Comparative Example 1

[0067] Comparative Example 1 is a conventional transfer matte film, differing from Example 1 only in that the antistatic masterbatch is different and used only in the core layer, while the lower and lower sub-bottom layers use ordinary matte materials, and the sub-top layer uses a silicone slip agent. Specifically, the antistatic masterbatch in Comparative Example 1 comprises the following raw materials by mass percentage: 55% copolymer polypropylene and 45% antistatic agent; the melt index of the antistatic masterbatch at 230°C / 2.16KG standard test is 26.64 g / 10min; the antistatic agent is oleamide, and the proportion of silicone slip agent used in the sub-top layer is 3-6%, with a melt index of 15.84 g / 10min at 230°C / 2.16KG standard test.

[0068] Comparative Example 2

[0069] The only difference between Comparative Example 2 and Example 1 is that the antistatic masterbatch is different. The antistatic masterbatch includes the following raw materials in the following mass percentages: 55% copolymer polypropylene and 45% antistatic agent; the melt index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 26.64g / 10min; the antistatic agent is composed of monoglyceride fatty acid ester and oleic acid amide in a mass ratio of 1:1.

[0070] Test case

[0071] The physical properties of the films prepared in Examples 1-3 and Comparative Examples 1-2 were tested, and the test results are shown in Table 1:

[0072] Table 1 Main physical properties of the thin film

[0073]

[0074]

[0075] As shown in Table 1, the mechanical properties of the five groups of antistatic coating transfer matting films meet the national standards. Among them, the transfer films using high-flowability antistatic masterbatch in Examples 1-3 have lower surface resistance, higher electrostatic attenuation rate, better haze and matting effect, and lower shrinkage compared with the transfer films using ordinary antistatic masterbatch in Comparative Examples 1-2. The transfer coating effect is better during use, and no poor transfer occurs. Therefore, it has a better matting transfer effect.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An antistatic coating transfer matte film, characterized in that, It consists of a lower surface layer, a second lower surface layer, a core layer, and an upper surface layer in sequence. The lower surface layer and the second lower surface layer are antistatic matting transfer layers, and the upper surface layer is an anti-adhesion layer. The anti-adhesion layer comprises the following raw materials: anti-adhesion masterbatch and homopolymer polypropylene; The core layer comprises the following raw materials: homopolymer polypropylene and antistatic masterbatch; The antistatic matting transfer layer comprises the following raw materials in the following mass percentages: 0.1-0.5% antistatic masterbatch, 0.5-2% slip masterbatch, and the remainder being matting transfer material; The matting transfer material comprises the following raw materials in the following mass percentages: 20-30% matting agent, 6-10% compatibilizer, 0.1-0.3% antioxidant, and the balance being a binary copolymer polypropylene; the melt flow index of the matting transfer material at 230℃ / 2.16KG standard test is 3.0-5.0g / 10min; The antistatic masterbatch comprises the following raw materials in the following mass percentages: 55-65% copolymer polypropylene and 35-45% antistatic agent; the antistatic agent is composed of nonionic glycerol fatty acid ester, acid amine and its derivatives in a mass ratio of 1:(0.8-2); the melt index of the antistatic masterbatch at 230℃ / 2.16KG standard test is 60.0-70.0g / 10min; The slip masterbatch comprises the following raw materials in the following mass percentages: 80-90% homopolymer polypropylene and 10-20% slip agent; the melt index of the slip masterbatch at 230℃ / 2.16KG standard test is 15-20.0g / 10min.

2. The antistatic coating transfer matte film according to claim 1, characterized in that, The anti-adhesion layer comprises the following raw materials in weight percentages: 2-5% anti-adhesion masterbatch and 95-98% homopolymer polypropylene; the core layer comprises the following raw materials in weight percentages: 97-99% homopolymer polypropylene and 1-3% antistatic masterbatch.

3. The antistatic coating transfer matte film according to claim 1, characterized in that, The anti-sticking masterbatch comprises the following raw materials in the following mass percentages: 94-96% homopolymer polypropylene and 4-6% synthetic silica; the melt flow index of the anti-sticking masterbatch at 230℃ / 2.16KG standard test is 4.0-9.0g / 10min.

4. The antistatic coating transfer matte film according to claim 1, characterized in that, The sum of the thicknesses of the lower surface layer and the next lower surface layer is 2.0~2.5μm, the thickness of the core layer is 18~19.5μm, and the thickness of the upper surface layer is 0.8~1.5μm.

5. The antistatic coating transfer matte film according to claim 1, characterized in that, The sum of the thicknesses of the lower surface layer and the next lower surface layer is 2.0~2.3μm, the thickness of the core layer is 18.5~19.1μm, and the thickness of the upper surface layer is 0.8~1.1μm.

6. A method for preparing an antistatic coating transfer matte film as described in any one of claims 1 to 5, characterized in that, The process includes the following steps: the raw materials for the lower surface layer, the next lower surface layer, and the upper surface layer are added to three auxiliary extruders, the raw materials for the core layer are added to the main extruder, heated and melted, then co-extruded through a die head, cooled by a quenching roller to form a cast sheet, the cast sheet is stretched longitudinally, then preheated, stretched laterally, shaped, and cooled to obtain the final product.

7. The method for preparing the antistatic coating transfer matte film according to claim 6, characterized in that, The heating and melting temperature of the lower surface layer and the next lower surface layer is 220~225℃, the heating and melting temperature of the core layer is 250~260℃, and the heating and melting temperature of the upper surface layer is 235~245℃. The longitudinal stretching has a stretching ratio of 4.8 to 5.1 and a temperature of 110 to 125°C. The temperature for the transverse stretching is 155~180℃.

Images