A composite film material based on olefin copolymer and a process for its production

Abstract

The present application relates to the technical field of C09J, more particularly, the present application relates to a kind of composite film material based on olefin copolymer and its preparation process.Composite film material based on olefin copolymer includes olefin copolymer layer, resin layer, polyester layer in turn.The preparation raw materials of olefin copolymer layer include 85-95 parts of olefin copolymer, 10-20 parts of auxiliary agent, 1-5 parts of low molecular weight oil, 10-15 parts of vinyl silicone resin by weight.The composite film material based on olefin copolymer of the present application has excellent thermal stability, high strength, and excellent heat resistance, while maintaining certain antistatic property, has good waterproof and breathable.

Description

Technical Field

[0001] This invention relates to the field of C09J technology, and more specifically, to a composite film material based on olefin copolymers and its preparation process. Background Technology

[0002] Currently, adhesives are widely used in various fields. Research on processing adhesives into products that are easy to produce, use, and possess certain functionalities is a hot topic. Preparing composite films by coating adhesives onto tapes has a wide range of applications. Typically, composite films consist of an olefin copolymer layer (base film), a resin layer (adhesive), and a polyester layer (covering layer). CN201711239911 describes a repair tape obtained through a polyurethane layer, a functional adhesive layer, and a release material layer, exhibiting certain waterproof and strong adhesion properties; however, this tape has poor antistatic properties, is difficult to process, and its application is limited. CN201711001902 describes a double-sided adhesive obtained through a flame-retardant layer, a film layer, and an adhesive layer, achieving a flame-retardant effect; however, the aging resistance, yellowing resistance, and antistatic properties of this double-sided adhesive need improvement. Furthermore, the above inventions lack a clear description of the base film preparation process. This invention provides a method for preparing the base film of a high-performance composite tape, exhibiting good processing performance, no pitting, yellowing resistance, and antistatic properties. Because the base film requires surface corona treatment during the adhesive coating process, a large amount of static electricity is generated on its surface, which can pose a safety hazard in electronic applications. Therefore, improving the antistatic properties of the film is very important. Summary of the Invention

[0003] In view of some problems existing in the prior art, the first aspect of the present invention provides a composite film material based on olefin copolymer, comprising an olefin copolymer layer, a resin layer, and a polyester layer in sequence.

[0004] In one embodiment, the raw materials for preparing the olefin copolymer layer, by weight, include 85-95 parts of olefin copolymer, 10-20 parts of additives, 1-5 parts of low molecular weight oil, and 10-15 parts of vinyl silicone resin; preferably, by weight, the raw materials for preparing the olefin copolymer layer include 92 parts of olefin copolymer, 17 parts of additives, 3 parts of low molecular weight oil, and 12 parts of vinyl silicone resin.

[0005] Preferably, the olefin copolymer is selected from one or more of polyethylene, polypropylene, polystyrene, terpolymers, and ethylene-propylene copolymers.

[0006] In the simple processing of polyethylene, while polyethylene is easy to process and mold, it is very soft, easily deformed, and lacks strength. Adding polystyrene can improve the strength and temperature resistance of the material, but the compatibility of the two is poor, and they are prone to yellowing and generating a large number of pits (crystal points) during processing. Therefore, the addition of terpolymers and ethylene-propylene copolymers is considered.

[0007] Preferably, the weight ratio of the polyethylene, polystyrene, terpolymer, and ethylene-propylene copolymer is 1:(1.5-2):(0.2-0.7):(1.2-1.8), and more preferably the weight ratio is 1:1.7:0.5:1.4.

[0008] Preferably, the polyethylene has a melt flow rate of 3-5 g / 10 min at 190°C / 2.16 kg, more preferably 4 g / 10 min.

[0009] The test standard for the melt flow rate of polyethylene in this application is ISO 1133.

[0010] The polyethylene grade used in this application, with a melt flow rate of 4 g / 10 min at 190℃ / 2.16 kg, is designated ADMER. TM NF468A, purchased from Mitsui, Japan.

[0011] Preferably, the polystyrene has a melt flow rate of 6-11 g / min at 200℃ / 5Kg, which is beneficial to improving its processing performance.

[0012] The test standard for the melt flow rate of polystyrene in this application is ASTM D1238 / ISO 1133.

[0013] Polystyrene with a melt flow rate of 5 g / 10 min at 200℃ / 5 kg was purchased from Dongguan Yuanlv Polymer Materials Co., Ltd., and its brand name was Yangzi BASF 2710.

[0014] Preferably, the terpolymer is an ethylene-ethyl acrylate terpolymer with a tensile strength of 10-15 MPa and an elongation at break of 600-800%.

[0015] Preferably, the terpolymer used in this application is EEATX 8030, purchased from Arkema, France, with a tensile strength of 12 MPa and an elongation at break of 700%.

[0016] Preferably, the ethylene content in the ethylene-propylene copolymer is 15-20 wt%, more preferably 16 wt%.

[0017] Preferably, the ethylene-propylene copolymer is grade 6102FL and is purchased from Shenzhen Epuno Chemical Co., Ltd.

[0018] During the experiment, the applicant discovered that although the specific polyethylene and polystyrene in this application give the olefin copolymer layer a certain mechanical strength, the processed olefin copolymer layer has distinguishable pitting. The applicant unexpectedly discovered that when the ethylene content in the ethylene-propylene copolymer is 15-20 wt% and the grade is 6102FL, it not only provides a certain processing stability, but also works together with the terpolymer in this application to avoid the pitting problem of the olefin copolymer.

[0019] To further enhance processing performance, flow improvers need to be added.

[0020] In one embodiment, the hydrogen content of the low molecular weight hydrogen-containing oil is 1.4-1.7 wt%, preferably 1.58-1.6 wt%. Another advantage of the hydrogen-containing oil is that it can improve the anti-yellowing properties of the base film. Simultaneously, to prevent the precipitation of hydrogen-containing silicone oil during processing, a portion of vinyl silicone oil is added to react with the hydrogen-containing silicone oil. Furthermore, the aforementioned additives help to avoid the accumulation of static electricity during surface electrostatic treatment.

[0021] Preferably, the low molecular weight oil has a viscosity of 20-30 mmHg at 25°C. 2 / s.

[0022] Preferably, the low molecular weight oil is purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd.

[0023] In one embodiment, the vinyl content in the vinyl silicone resin is 0.5-1.5 wt%.

[0024] Preferably, the viscosity of the vinyl silicone resin at 25°C is 30,000-100,000 cP.

[0025] Preferably, the vinyl silicone resin is grade 5202N and is purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.

[0026] Other processing aids may be added as needed, and no restrictions are imposed in this application.

[0027] In this application, the selection and preparation method of the resin layer are not particularly limited, and those skilled in the art can make conventional selections, such as acrylate resin, etherified melamine-formaldehyde resin, polyurethane, etc. The coating method can employ conventional processes, such as:

[0028] (1) The raw materials for preparing the olefin copolymer layer are mixed and then melt-extruded and cooled to form an olefin copolymer layer. One side of the olefin copolymer layer is then subjected to corona treatment to obtain a corona-treated surface.

[0029] (2) The adhesive resin layer is mixed and dispersed and then coated onto the corona-treated surface.

[0030] (2) The polyester layer is laminated with the base film coated with adhesive to obtain the product.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] (1) This application optimizes the processing of polyethylene and polystyrene by controlling their melt flow index.

[0033] (2) Optimizing the structure of the ethylene-propylene copolymer improves processing stability and avoids the occurrence of pitting during processing.

[0034] (4) This application improves the flexibility of the olefin copolymer layer and maintains a certain resistance to bending by adjusting the raw material ratio of the olefin copolymer layer.

[0035] (5) By using appropriate fillers, thermal stability and strength are improved, while maintaining a certain level of antistatic properties and good waterproof and breathable properties. Detailed Implementation

[0036] The present invention will be described below through specific embodiments, but is not limited to the specific embodiments given below.

[0037] Example

[0038] Example 1

[0039] Example 1 of the present invention provides a composite film material based on olefin copolymer, comprising an olefin copolymer layer, a resin layer, and a polyester layer (polyester film).

[0040] By weight, the raw materials for preparing the olefin copolymer layer are 85 parts of olefin copolymer (polyethylene, polystyrene, terpolymer, and ethylene-propylene copolymer in a weight ratio of 1:0.5:0.3:0.6), 10 parts of additives (oleamide, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1,3,5-trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxyphenyl)benzene in a weight ratio of 2:2:1), and 1 part of a low molecular weight oil (hydrogen content of 1.58-1.6 wt%, viscosity of 20-30 mmHg at 25°C). 2 / s, purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd.), 10 parts of vinyl silicone resin (vinyl content 0.5-1.5wt%, viscosity at 25℃ 30000-100000cP, grade 5202N, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.).

[0041] The polyethylene has a melt flow rate of 4 g / 10 min at 190℃ / 2.16 kg, and its grade is ADMER. TM NF468A, purchased from Mitsui, Japan.

[0042] The polystyrene, with a melt flow rate of 9.5 g / 10 min at 200°C / 5 kg, was purchased from INEOS Styrolution, Switzerland, under the brand name Styrolution PS 495F.

[0043] In this application, the terpolymer is an ethylene ethyl acrylate terpolymer, the grade of which is EEA TX8030, purchased from Arkema, France, with a tensile strength of 12 MPa and an elongation at break of 700%.

[0044] The ethylene-propylene copolymer has an ethylene content of 16 wt%, is grade 6102FL, and was purchased from Shenzhen Epuno Chemical Co., Ltd.

[0045] The raw materials for preparing the resin layer are acrylate resin and n-butanol etherified melamine-formaldehyde resin in a 14:1 ratio; wherein the n-butanol etherified melamine-formaldehyde resin is branded as Longfei 882 and was purchased from Chuzhou Longfei Chemical Co., Ltd.

[0046] The polyester layer is grade CB-602 and was purchased from Foshan City, Nanhai District, Dali Sangyi Plastic Materials Business Department.

[0047] The preparation method of composite film material based on olefin copolymer is as follows:

[0048] (1) The raw materials for preparing the olefin copolymer layer are mixed and then melt-extruded and cooled to form an olefin copolymer layer. One side of the olefin copolymer layer is then subjected to corona treatment to obtain a corona-treated surface.

[0049] (2) After coating one side of the polyester layer with a resin mixture, it is laminated with the corona-treated side to obtain the final product.

[0050] Example 2

[0051] Example 2 of the present invention provides a composite film material based on olefin copolymer, comprising an olefin copolymer layer, a resin layer, and a polyester layer (polyester film) in sequence.

[0052] By weight, the raw materials for preparing the olefin copolymer layer are 95 parts of olefin copolymer (polyethylene, polystyrene, terpolymer, and ethylene-propylene copolymer in a weight ratio of 1:2.6:0.5:1.5), 20 parts of additives (oleamide, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1,3,5-trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxyphenyl)benzene in a weight ratio of 2:2:1), and 5 parts of low molecular weight oil (hydrogen content of 1.58-1.6 wt%, viscosity of 20-30 mmHg at 25°C). 2 / s, purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd.), 15 parts of vinyl silicone resin (vinyl content 0.5-1.5wt%, viscosity at 25℃ 30000-100000cP, grade 5202N, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.).

[0053] The polyethylene has a melt flow rate of 4 g / 10 min at 190℃ / 2.16 kg, and its grade is ADMER. TM NF468A, purchased from Mitsui, Japan.

[0054] The polystyrene with a melt flow rate of 9.5 g / 10 min at 200℃ / 5 kg was purchased from INEOS Styrolution, Switzerland, under the brand name Styrolution PS 495F.

[0055] In this application, the terpolymer is an ethylene ethyl acrylate terpolymer, the grade of which is EEATX8030, purchased from Arkema, France, with a tensile strength of 12 MPa and an elongation at break of 700%.

[0056] The ethylene-propylene copolymer has an ethylene content of 16 wt%, is grade 6102FL, and was purchased from Shenzhen Epuno Chemical Co., Ltd.

[0057] The resin layer is prepared from acrylate resin and n-butanol etherified melamine-formaldehyde resin in a 16:1 ratio; wherein the n-butanol etherified melamine-formaldehyde resin is branded as Longfei 882 and was purchased from Chuzhou Longfei Chemical Co., Ltd.

[0058] The preparation method of the acrylic resin is the same as in Example 1.

[0059] The polyester layer is grade CB-602 and was purchased from Foshan City, Nanhai District, Dali Sangyi Plastic Materials Business Department.

[0060] The preparation method of the composite film material based on olefin copolymer is the same as in Example 1.

[0061] Example 3

[0062] Example 3 of the present invention provides a composite film material based on olefin copolymer, comprising an olefin copolymer layer, a resin layer, and a polyester layer (polyester film) in sequence.

[0063] By weight, the raw materials for preparing the olefin copolymer layer are 92 parts of olefin copolymer (polyethylene, polystyrene, terpolymer, and ethylene-propylene copolymer in a weight ratio of 1:1.7:0.5:1.4), 17 parts of additives (oleamide, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1,3,5-trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxyphenyl)benzene in a weight ratio of 2:2:1), and 3 parts of low molecular weight oil (hydrogen content of 1.58-1.6 wt%, viscosity of 20-30 mmHg at 25°C). 2 / s, purchased from Zhejiang Hengyecheng Organosilicon Co., Ltd.), 12 parts of vinyl silicone resin (vinyl content 0.5-1.5wt%, viscosity at 25℃ 30000-100000cP, grade 5202N, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.).

[0064] The polyethylene has a melt flow rate of 4 g / 10 min at 190℃ / 2.16 kg, and its grade is ADMER. TM NF468A, purchased from Mitsui, Japan.

[0065] The polystyrene with a melt flow rate of 9.5 g / 10 min at 200℃ / 5 kg was purchased from INEOS Styrolution, Switzerland, under the brand name Styrolution PS 495F.

[0066] In this application, the terpolymer is an ethylene ethyl acrylate terpolymer, the grade of which is EEATX8030, purchased from Arkema, France, with a tensile strength of 12 MPa and an elongation at break of 700%.

[0067] The ethylene-propylene copolymer has an ethylene content of 16 wt%, is grade 6102FL, and was purchased from Shenzhen Epuno Chemical Co., Ltd.

[0068] The resin layer is prepared from acrylate resin and n-butanol etherified melamine-formaldehyde resin in a 15:1 ratio; wherein the n-butanol etherified melamine-formaldehyde resin is branded as Longfei 882 and was purchased from Chuzhou Longfei Chemical Co., Ltd.

[0069] The preparation method of the acrylic resin is the same as in Example 1.

[0070] The polyester layer is grade CB-602 and was purchased from Foshan City, Nanhai District, Dali Sangyi Plastic Materials Business Department.

[0071] The preparation method of the composite film material based on olefin copolymer is the same as in Example 1.

[0072] Example 4

[0073] Example 4 of the present invention provides a composite film material based on olefin copolymer, which is the same as that in Example 3, except that the olefin copolymer in the raw materials for preparing the olefin copolymer layer is polyethylene and polystyrene in a weight ratio of 1:1.7.

[0074] The preparation method of the composite film material based on olefin copolymer is the same as in Example 3.

[0075] Example 5

[0076] Example 5 of the present invention provides a composite film material based on olefin copolymer, which is the same as that in Example 3, except that the olefin copolymer in the raw materials for preparing the olefin copolymer layer is polyethylene and polystyrene in a weight ratio of 1:1.7, without low molecular weight oil and vinyl silicone resin.

[0077] The preparation method of the composite film material based on olefin copolymer is the same as in Example 3.

[0078] Performance evaluation

[0079] 1. Appearance quality: 100 products were produced according to the description of the three-layer adhesive film in Examples 1-5. The number of products with pinholes in each of the 100 products was recorded. Products with more than 20 pinholes were recorded as poor, products with 5-20 pinholes were recorded as medium, and products with less than 5 pinholes were recorded as excellent.

[0080] 2. Yellowing resistance: The products of Examples 1-5 were exposed to the outdoor environment and the time of yellowing was recorded. The results are shown in Table 1. The longer the time of yellowing, the more positive signs there are.

[0081] Table 1

[0082] Appearance quality Yellowing resistance Example 1 excellent +++ Example 2 excellent +++ Example 3 excellent +++ Example 4 Difference ++ Example 5 Difference +

Claims

1. A composite film material based on an olefin copolymer layer, a resin layer, and a polyester layer, characterized in that, The raw materials for preparing the olefin copolymer layer include 92 parts of olefin copolymer, 17 parts of auxiliary agent, 3 parts of low-molecular-weight hydrogen-containing oil, and 12 parts of vinyl silicone resin by weight; The olefin copolymer is polyethylene, polystyrene, terpolymer and ethylene-propylene copolymer, and the weight ratio is 1:1.7:0.5:1.4; The melt flow rate of the polyethylene at 190℃ / 2.16Kg is 4g / 10min, and the melt flow rate of the polystyrene at 200℃ / 5Kg is 9.5g / 10min; The ethylene content in the ethylene-propylene copolymer is 16wt%, and the grade is 6102FL; The terpolymer is ethylene-ethyl acrylate terpolymer, the grade is EEA TX 8030, the tensile strength is 12MPa, and the elongation at break is 700%.

2. The composite film material according to claim 1, wherein the olefin copolymer layer, the resin layer, and the polyester layer are laminated in this order. The hydrogen content of the low-molecular-weight hydrogen-containing oil is 1.58-1.6wt%.