阅读说明：本技术 一种用于补强板的粘结剂及其补强板 (binder for reinforcing plate and reinforcing plate thereof ) 是由 李政 叶海南 于 2019-09-27 设计创作，主要内容包括：一种用于补强板的粘结剂及其补强板,其粘结剂包括：饱和聚酯树脂A、饱和聚酯树脂B、TPU树脂、异氰酸酯和填充剂；所述饱和聚酯树脂A的玻璃化温度-20-10℃；饱和聚酯树脂B的玻璃化温度为40-60℃；TPU树脂的玻璃化温度-10-20℃；所述饱和聚酯树脂A为结晶型树脂；其补强板,包括：绝缘薄膜层、油墨层和胶黏剂层。本粘结剂中,将饱和聚酯树脂A、饱和聚酯树脂B、TPU树脂(全称为热塑性聚氨酯弹性体)、异氰酸酯和填充剂配合使用,并严格限制饱和聚酯树脂A、饱和聚酯树脂B和TPU树脂三者的玻璃化温度,按上述的搭配即可制备出一种TPU层和PET层都有强粘结效果的胶黏剂层。(a kind of binder used for stiffening plate and its stiffening plate, its binder includes: saturated polyester resin A, saturated polyester resin B, TPU resin, isocyanate and filler; the glass transition temperature of the saturated polyester resin A is-20-10 ℃; the glass transition temperature of the saturated polyester resin B is 40-60 ℃; the glass transition temperature of the TPU resin is-10-20 ℃; the saturated polyester resin A is a crystalline resin; its stiffening plate includes: insulating film layer, printing ink layer and gluing agent layer. In the adhesive, the saturated polyester resin A, the saturated polyester resin B, TPU resin (fully called thermoplastic polyurethane elastomer), isocyanate and a filler are matched for use, the glass transition temperatures of the saturated polyester resin A, the saturated polyester resin B and the TPU resin are strictly limited, and the adhesive layer with the strong adhesive effect on the TPU layer and the PET layer can be prepared according to the matching.)

1. An adhesive for a reinforcing plate, comprising: saturated polyester resin A, saturated polyester resin B, TPU resin, isocyanate and filler;

The glass transition temperature of the saturated polyester resin A is-20-10 ℃; the glass transition temperature of the saturated polyester resin B is 40-60 ℃; the glass transition temperature of the TPU resin is-10-20 ℃;

the saturated polyester resin A is a crystalline resin.

2. The bonding agent for reinforcing plate of claim 1, which comprises, in mass fraction: 50-70% of saturated polyester resin A, 10-15% of saturated polyester resin B, 10-20% of TPU resin, 3-10% of isocyanate and the balance of filler.

3. the bonding agent for reinforcing plates according to claim 1 or 2, wherein the saturated polyester resin A is epoxy resin modified saturated polyester.

4. the adhesive for reinforcing plates as claimed in claim 3, wherein the isocyanate is any one or a combination of a dimer of toluene diisocyanate or a polymer thereof, a dimer of 2, 4-diphenylmethane diisocyanate or a polymer thereof, a dimer of hexamethylene diisocyanate or a polymer thereof, a dimer of isophorone diisocyanate or a polymer thereof, a dimer of xylylene diisocyanate or a polymer thereof and an adduct of the above isocyanate.

5. the adhesive for reinforcing plates according to claim 4, wherein the isocyanate is a combination of hexamethylene diisocyanate and xylylene diisocyanate.

6. The adhesive for reinforcing plates as claimed in claim 5, wherein the combined ratio of the hexamethylene diisocyanate and the xylylene diisocyanate is (1-2): 1.

7. The bonding agent for reinforcing plate of claim 1, wherein the filler is any one or combination of hydrophobic gas silicon, semi-hydrophobic gas silicon, hydrophilic gas silicon, wollastonite, mica, kaolin and talc powder.

8. A stiffener, comprising: the ink layer is arranged on the insulating film layer;

The adhesive layer is prepared from the adhesive in any one of claims 1-7;

The thickness of the insulating film layer is 12-250 mu m; the thickness of the ink layer is 1-3 μm; the thickness of the adhesive layer is 20-50 μm.

9. The stiffening plate of claim 8 wherein the insulating film layer is one of a polyethylene terephthalate film layer, a polybutylene terephthalate film layer, and a polyethylene naphthalate film layer.

Technical Field

The invention relates to the technical field of FFC (flexible flat cable) wires, in particular to a bonding agent for a reinforcing plate and the reinforcing plate.

Background

In the wire connecting line industry, some wires are made of flat wires by using TPU (thermoplastic polyurethane) adhesive films as wire insulating layers, and the wires made of the TPU adhesive films have the excellent characteristics of oil resistance, water resistance, bacteria resistance and the like. The existing TPU glue film is used as a flat wire of a wire insulating layer and also needs to use a reinforcing plate, but the problems of infirm bonding, insufficient high temperature resistance and low temperature resistance and the like exist when the TPU glue film is matched with the common reinforcing plate for the FFC in the market, particularly the problem of poor bonding effect between a PET layer and a TPU layer, and the reason is that the collocation of components in the existing bonding agent is unreasonable, and the problems of difference and proportioning among the attributes of the components are not considered.

Disclosure of Invention

the invention aims to provide a bonding agent for a reinforcing plate, which is reasonably prepared from saturated polyester resin A, saturated polyester resin B and TPU resin.

The invention also provides a reinforcing plate which uses the adhesive.

In order to achieve the purpose, the invention adopts the following technical scheme:

An adhesive for a reinforcing panel, comprising: saturated polyester resin A, saturated polyester resin B, TPU resin, isocyanate and filler;

The glass transition temperature of the saturated polyester resin A is-20-10 ℃; the glass transition temperature of the saturated polyester resin B is 40-60 ℃; the glass transition temperature of the TPU resin is-10-20 ℃;

The saturated polyester resin A is a crystalline resin.

Further, the method comprises the following steps of: 50-70% of saturated polyester resin A, 10-15% of saturated polyester resin B, 10-20% of TPU resin, 3-10% of isocyanate and the balance of filler.

further, the saturated polyester resin A is epoxy resin modified saturated polyester.

More specifically, the isocyanate is any one or a combination of a dimer of toluene diisocyanate or a polymer thereof, a dimer of 2, 4-diphenylmethane diisocyanate or a polymer thereof, a dimer of hexamethylene diisocyanate or a polymer thereof, a dimer of isophorone diisocyanate or a polymer thereof, a dimer of xylylene diisocyanate or a polymer thereof, and an adduct of the above isocyanate.

more specifically, the isocyanate is a combination of hexamethylene diisocyanate and xylylene diisocyanate.

Further, the combined ratio of the hexamethylene diisocyanate and the xylylene diisocyanate is (1-2): 1.

In a further aspect, the filler is any one or a combination of hydrophobic gas silicon, semi-hydrophobic gas silicon, hydrophilic gas silicon, wollastonite, mica, kaolin and talc powder.

A stiffener, comprising: the ink layer is arranged on the insulating film layer;

The adhesive layer is prepared from the adhesive in any one of claims 1-7;

The thickness of the insulating film layer is 12-250 mu m; the thickness of the ink layer is 1-3 μm; the thickness of the adhesive layer is 20-50 μm.

further, the insulating film layer is one of a polyethylene terephthalate film layer, a polybutylene terephthalate film layer, and a polyethylene naphthalate film layer.

the invention has the beneficial effects that:

In the adhesive, the saturated polyester resin A, the saturated polyester resin B, TPU resin, isocyanate and a filler are used in a matching manner, the glass transition temperatures of the saturated polyester resin A, the saturated polyester resin B and the TPU resin are strictly limited, and the adhesive layer with strong adhesive effect on the TPU layer and the PET layer can be prepared according to the matching.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

an adhesive for a reinforcing panel, comprising: saturated polyester resin A, saturated polyester resin B, TPU resin, isocyanate and filler;

The glass transition temperature of the saturated polyester resin A is-20-10 ℃; the glass transition temperature of the saturated polyester resin B is 40-60 ℃; the glass transition temperature of the TPU resin is-10-20 ℃;

The saturated polyester resin A is a crystalline resin.

In the adhesive, the saturated polyester resin A, the saturated polyester resin B, TPU resin (fully called thermoplastic polyurethane elastomer), isocyanate and a filler are matched for use, the glass transition temperatures of the saturated polyester resin A, the saturated polyester resin B and the TPU resin are strictly limited, and the adhesive layer with the strong adhesive effect on the TPU layer and the PET layer can be prepared according to the matching.

further, the method comprises the following steps of: 50-70% of saturated polyester resin A, 10-15% of saturated polyester resin B, 10-20% of TPU resin, 3-10% of isocyanate and the balance of filler.

Further, at the same time, the binder further limits the use ranges of the contents of the saturated polyester resin A, the saturated polyester resin B, TPU resin, the isocyanate and the filler; when the components are in the proportion, the adhesive can achieve the stripping force of 55N/in for the highest viscosity TPU insulating layer and 55N/in for the PET substrate layer.

Further, the saturated polyester resin A is epoxy resin modified saturated polyester.

the epoxy resin modified saturated polyester, the saturated polyester resin B, TPU resin, isocyanate and filler are used in reinforcing plate at-10-105 deg.c to raise the effect of high temperature and low temperature resistance.

more specifically, the isocyanate is any one or a combination of a dimer of toluene diisocyanate or a polymer thereof, a dimer of 2, 4-diphenylmethane diisocyanate or a polymer thereof, a dimer of hexamethylene diisocyanate or a polymer thereof, a dimer of isophorone diisocyanate or a polymer thereof, a dimer of xylylene diisocyanate or a polymer thereof, and an adduct of the above isocyanate.

More specifically, the isocyanate is a combination of hexamethylene diisocyanate and xylylene diisocyanate.

Further, the combined ratio of the hexamethylene diisocyanate and the xylylene diisocyanate is (1-2): 1.

Further, the above two are mixed in a ratio of 1: 1, the prepared reinforcing plate can still keep 50N/in a constant temperature and humidity environment for 1000 hours by matching the glass transition temperature conditions of the saturated polyester resin A, the saturated polyester resin B and the TPU resin, and has good weather resistance and difficult yellowing;

in a further aspect, the filler is any one or a combination of hydrophobic gas silicon, semi-hydrophobic gas silicon, hydrophilic gas silicon, wollastonite, mica, kaolin and talc powder.

A stiffener, comprising: the ink layer is arranged on the insulating film layer;

The adhesive layer is prepared from the adhesive in any one of claims 1-7;

the thickness of the insulating film layer is 12-250 mu m; the thickness of the ink layer is 1-3 μm; the thickness of the adhesive layer is 20-50 μm.

Further, the insulating film layer is one of a polyethylene terephthalate film layer, a polybutylene terephthalate film layer, and a polyethylene naphthalate film layer.

And (3) performance testing:

(1) Appearance of the product

After the glue layer is visually coated on the surface of the insulating film layer ink, the glue layer has no bubbles, pinholes or particles.

(2) Back adhesive

The glue layer of the finished glue film with the glue layer coated on the PET surface is flatly attached to the non-corona surface of the PET, the specification of the sample plate is 50mmX200mm, a 5kg weight is flatly placed on the sample plate, the stripping force of the sample plate is measured after the sample plate is placed in a 50 ℃ oven for 48 hours, the stripping speed of a tensile machine is 50mm/min, and the stripping value is less than 0.2N/5cm, so that the PET is qualified.

(3) Peel force of TPU-bonded insulation layer

a TPU adhesive film is taken as a wire of an insulating layer, the adhesive coating surface of a reinforcing plate prepared by the adhesive is attached to the TPU adhesive film surface, and the TPU adhesive film is rolled by a rolling tester at the temperature of 180 ℃, the speed of 1.0m/min and the pressure of 0.4-0.5 mpas. The press-fitted panels were left for 24 hours and then cut to a width of 1 inch to test the peel strength. Peeling test speed: the adhesive force is qualified when the adhesive force is more than 35N/IN after 100 mm/min.

(4) peel force of bonded PET substrate layer

Taking a reinforcing plate with a PET substrate layer model, gluing the gluing surface of the reinforcing plate prepared by the adhesive, attaching the non-gluing surface of the reinforcing plate, rolling by using a rolling tester at the temperature of 180 ℃, at the speed of 1.0m/min and at the pressure of 0.4-0.5 mpas. The press-fitted panels were left for 24 hours and then cut to a width of 1 inch to test the peel strength. Peeling test speed: the adhesive force is qualified when the adhesive force is more than 35N/IN after 100 mm/min.

(5) Temperature range of use test

hot pressing the reinforcing plate on the TPU flat wire; and placing the flat wire into a high-low temperature pulling machine, clamping the reinforcing plate and the flat wire by a pulling end of the pulling machine, standing for 1h at a specific temperature of minus 10 ℃, starting the pulling machine to test the pulling force of the reinforcing plate and the flat wire, and if the pulling force is continuous, judging that the adhesive force is greater than 1.2N/10mm to be qualified.

(6)85 ℃, 85% RH, 1000H peel force (sticky PET): and (3) hot-pressing the reinforcing plate on the TPU flat wire, placing the TPU flat wire IN a constant-temperature constant-humidity aging box with the ambient temperature of 85 ℃ and the humidity of 85% for 1000 hours, taking out the sample, and testing the peeling force at 180 degrees, wherein the qualified TPU flat wire is obtained when the adhesive force is more than 35N/IN.