CN214395779U - Composite skin for automobile armrest - Google Patents

Abstract

The utility model relates to a car handrail is with compound epidermis mainly solves and has among the prior art when car handrail is with compound epidermis stripping force height, can not satisfy the problem that ageing resistance is good, the smell is low simultaneously. The utility model adopts a novel composite surface skin for the automobile handrail, which comprises a PVC layer 1 and a PU sponge layer 2 from top to bottom in sequence; one side of the PVC layer 1 is in flame composite fit with one side of the PU sponge layer 2, and the PVC is polyvinyl chloride artificial leather; the PU sponge layer 2 is a technical scheme of polyurethane flame composite sponge, better solves the problem, and can be used in the application of composite skins for automobile armrests.

Description

Composite skin for automobile armrest

Technical Field

The utility model relates to a car handrail is with compound epidermis.

Background

Polyester type sponge or polyether type sponge is generally used for the composite surface skin of the automobile armrest on the market at present. When the polyether sponge is subjected to flame compounding, flame compounding agents do not need to be added, the polyether sponge can also have the stripping force meeting the requirements, but the polyester sponge has poor aging resistance, the related mechanical properties (tensile strength and elongation at break) of the polyester sponge are reduced by 40-50% under the high-temperature and high-humidity conditions, and meanwhile, high-pressure equipment is required for foaming in the preparation process of the polyester sponge, so that the requirement on a foaming process is high, and the cost is high. The polyether sponge has good aging resistance due to the characteristics of the polyether sponge, and the related mechanical properties of the polyether sponge are basically not greatly influenced under the conditions of high temperature and high humidity; however, when flame compounding is carried out, a large amount of flame compounding agent needs to be added to meet the requirements on the peeling force after the sponge and the leather are attached, and the flame compounding machine contains a large amount of small molecular substances which are easy to volatilize, so that the produced sponge has large smell and high VOC total amount, and the environment in a vehicle is influenced.

With the continuous development of the consumption level, people have higher and higher requirements on the performance of the automotive interior material; due to the large climate difference in the four seasons of the world, the requirements on the storage conditions and the climate adaptability of automobiles are higher and higher. Therefore, the requirements of the sponge material can meet the requirements of peeling force, good aging resistance and low odor.

Because the position of car handrail is special, there are a lot of curved surfaces, in order to can laminate the compliance when artifical laminating, need compound epidermis to have better extensibility.

The ageing resistance of polyurethane sponges is evaluated in the prior art, and the polyurethane sponges are usually subjected to moist heat ageing for 200 hours at 90 ℃ and (100-6)% relative humidity and then to tensile strength and elongation at break tests in accordance with DIN EN ISO 1798: 2008.

The odor test standard can be evaluated according to the odor grade of PV 3900-2000, the odor grade is divided into 1 to 6 grades, and the lower the grade is, the lower the odor is; among them, grade 3 is "clear odor but still without interference", grade 3.5 is "odor but without interference", grade 4.0 is "clear odor and not objectionable", grade 4.0 is "interfering odor and objectionable", and grade 4.5 is "strong interfering odor".

Chinese utility model patent CN201520081065.3 discloses a flame composite sponge, including the sponge body, this internal complex of sponge has the netted lamella of multilayer, and the sponge body upper surface and lower surface have respectively through flame complex to weave the cloth layer and weave the cloth layer down, go up to weave the cloth layer and weave the cloth layer periphery down and be equipped with bordures, netted lamella is net cloth, gauze or steel wire cloth, the sponge body is formed by polyether, reaction type flame retardant and polyisocyanate foaming. The utility model discloses in, compound sponge is polyether type's polyurethane sponge, need add the compound auxiliary agent of a large amount of flames during the flame is compound just can satisfy the requirement of peeling off power, and the VOC that results in the sponge that the preparation obtained is high, the smell is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, when having among the prior art that car handrail is with compound epidermis stripping force high, can not satisfy the problem that ageing-resistant can be good, smell is low simultaneously, provide a new car handrail is with compound epidermis, when this epidermis has stripping force high, ageing-resistant can be good and the advantage that smell is low.

In order to solve the technical problem, the utility model discloses a technical scheme as follows: the composite skin for the automobile handrail is characterized by sequentially comprising a PVC layer 1 and a PU sponge layer 2 from top to bottom; wherein the content of the first and second substances,

one side of the PVC layer 1 is in composite fit with one side of the PU sponge layer 2 through flame; PVC is polyvinyl chloride artificial leather;

the PU sponge layer 2 is a polyurethane flame composite sponge.

In the technical scheme, preferably, the tensile strength of the polyurethane flame composite sponge is 150-200 Kpa, and the elongation at break is not less than 200%; after aging for 200 hours at 90 ℃ and (100-6)% relative humidity, the tensile strength is 120-160 Kpa, and the elongation at break is not less than 160%.

In the above technical scheme, preferably, the polyurethane flame composite sponge is composed of a component I and a component II, the weight part ratio of the component I to the component II is 100: 20-60, wherein the component I comprises polyether polyol a in parts by weight: 30-60 parts of polyether polyol B: 30-60 parts of polymer polyol C: 10-40 parts of water: 1-5 parts of amine catalyst: 0.1-1 part of tin catalyst: 0.1-1 part of foam stabilizer: 0.5-2 parts of a flame retardant: 2-12 parts of flame complexing agent: 0.5-5 parts; the component II comprises 20-60 parts of isocyanate in parts by weight; wherein the molecular weight of the polyether polyol A is 1000-3000, the unsaturation degree is 0.01-0.2 mmol/g, and the functionality degree is 2-4; the polyether polyol B has the molecular weight of 1300-2800, the unsaturation degree of 0.01-0.2 mmol/g and the functionality of 2-4, wherein the polyether polyol B is polyether polyol containing an ester bond structure, small molecular alcohol is used as an initiator of the polyether polyol B, the polyether polyol B is formed by copolymerizing alkylene oxide and small molecular organic acid, and the ester bond content of the polyether polyol B is 3-15% in percentage by weight; the molecular weight of the polymer polyol C is 4000-7000, the functionality is 2-4, and the solid content is 28% -50%; the isocyanate is at least one of 2, 6-dimethylphenyl diisocyanate or 2, 4-dimethylphenyl diisocyanate.

In the above technical solution, preferably, the preparation method of the polyurethane flame composite sponge includes the following steps:

1) preparation of polyether polyol B: (1) reacting 100 parts by weight of small molecular alcohol with 500-900 parts by weight of alkylene oxide to form low molecular polyether polyol, wherein the reaction time is 6-10 hours, and the reaction temperature is 100-120 ℃; (2) carrying out polymerization reaction on 100 parts of the low-molecular-weight polyether polyol prepared in the step 1 and 50-150 parts by weight of small-molecular-weight organic acid to form polyol I, wherein the reaction time is 4-8 h and the reaction temperature is 110-130 ℃; (3) reacting 100 parts of the polyol I prepared in the step 2 with 50-200 parts by weight of alkylene oxide to form polyether polyol B, wherein the reaction time is 6-10 hours, and the reaction temperature is 110-135 ℃;

2) preparation of component I: adding polyether polyol A into a container A according to parts by weight: 30-60 parts of polyether polyol B: 30-60 parts of polymer polyol C: 10-40 parts of water: 1-5 parts of amine catalyst: 0.1-1 part of tin catalyst: 0.1-1 part of foam stabilizer: 0.5-2 parts of a flame retardant: 2-12 parts of flame complexing agent: 0.5-5 parts of the raw materials are uniformly stirred, the stirring speed is 2000-3000 rpm/min, and the temperature of the mixed materials is 20-30 ℃;

3) preparation of component II: adding 20-60 parts by weight of isocyanate into the container A, and stirring for 4-6 seconds to obtain a material I, wherein the stirring speed is 2000-4000 rpm/min;

4) and (3) quickly pouring the material I into a foaming box for curing for 10-72 hours, and preparing the polyurethane flame composite sponge after curing.

In the above technical solution, preferably, the thickness of the PVC layer 1 is 0.7-1.2 mm.

In the above technical scheme, preferably, the thickness of the PU sponge layer 2 is 3-9 mm.

The utility model provides a car handrail is with compound epidermis carries out the flame laminating with the PVC layer through the compound sponge of polyurethane flame who uses novel material, because the compound sponge of novel polyurethane flame has ether linkage and ester bond, can all have the characteristics of polyester type sponge and polyether type sponge. When flame compounding with leather, the prepared composite skin has higher peeling force (the peeling force is 15.1N/5cm after aging) only by adding a small amount of flame compounding agent, and meanwhile, the polyurethane flame compounded sponge is simple to prepare, has excellent aging resistance (the tensile strength is 188N before aging; the elongation at break is 205 percent, the tensile strength is 152N after aging; the elongation at break is 165 percent), has low odor (3.7 grade), high yield and low cost; meanwhile, the composite skin can be directly attached to the plastic part of the automobile handrail, and the extensibility of the skin is increased without increasing the base fabric, so that a better technical effect is achieved.

Drawings

FIG. 1 is a schematic view of a composite skin for an automobile armrest.

In the attached figure 1, 1 is a PVC layer, and 2 is a PU sponge layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

[ example 1 ]

A composite surface skin for an automobile handrail comprises a PVC layer 1 (with the thickness of 1.2mm) and a polyurethane flame composite sponge 2 (with the thickness of 5mm) from top to bottom; the PVC layer 1 is jointed with the polyurethane flame composite sponge layer 2 through a flame composite process.

The preparation method of the polyurethane flame composite sponge comprises the following steps:

polyether polyol a 1: molecular weight 2000, unsaturation 0.01mmol/g, functionality 2;

polyether polyol B1, wherein the molecular weight is 1400, the unsaturation degree is 0.011mmol/g, the functionality is 2, and the ester bond content of the polyether polyol B is 7.6 percent by weight;

polymer polyol C1: the molecular weight is 6000, the functionality is 3, and the solid content is 45%;

a) preparation of component I: adding polyether polyol A1 into a container A according to parts by weight: 30 parts of polyether polyol B1: 50 parts, polymer polyol C1: 20 parts of water: 2.4 parts, dimethylbenzylamine: 0.17 parts, diethyl cyclohexylamine, 0.18 parts, dibutyltin dilaurate: 0.12 part, SI-2302: 0.7 part, YK-68 LE: 5 parts, FLE-200 LF: 1.5 parts of the raw materials are uniformly stirred, the stirring speed is 2500rpm/min, and the temperature of the mixed materials is 25 ℃;

b) preparation of component II: adding 28 parts by weight of a mixture of 80% by weight of 2, 4-dimethylphenyl diisocyanate and 20% by weight of 2, 6-dimethylphenyl diisocyanate into a container A, and stirring for 6 seconds to obtain a material I, wherein the stirring speed is 3000 rpm/min;

c) and (3) quickly pouring the material I into a foaming box for curing for 48 hours, and preparing the polyurethane flame composite sponge after curing. The physical properties of the polyurethane flame-compounded sponge layer are shown in table 1, and the skin quality detection data after flame compounding is shown in table 2.

[ example 2 ]

A composite surface skin for an automobile handrail comprises a PVC layer 1 (with the thickness of 1.0mm) and a polyurethane flame composite sponge 2 (with the thickness of 6mm) from top to bottom; the PVC layer 1 is jointed with the polyurethane flame composite sponge layer 2 through a flame composite process.

The preparation method of the polyurethane flame composite sponge refers to example 1, the formula of each component is not changed, but 2.0 parts of flame composite agent FLE-200LF is added; the physical properties of the polyurethane flame-compounded sponge layer are shown in table 1, and the skin quality detection data after flame compounding is shown in table 2.

[ COMPARATIVE EXAMPLE 1 ]

A composite surface skin for an automobile handrail comprises a PVC layer (with the thickness of 1.2mm) and a polyester type PU sponge layer (with the thickness of 5mm) from top to bottom; the PVC layer is jointed with the polyester type PU sponge layer through a flame compounding process. The physical properties of the polyester PU sponge layer are shown in Table 1, and the skin quality detection data after flame compounding is shown in Table 2.

[ COMPARATIVE EXAMPLE 2 ]

A composite surface skin for an automobile handrail comprises a PVC layer (with the thickness of 1.1mm) and a polyether type PU sponge (with the thickness of 6mm) from top to bottom; the PVC layer is attached to the polyether type PU sponge layer through a flame compounding process. The physical properties of the polyether type PU sponge layer are shown in Table 1, and the skin quality detection data after flame compounding is shown in Table 2.

TABLE 1 physical Properties of PU sponge layers in examples 1 to 2 and comparative examples 1 to 2

The testing standards of the tensile strength and the elongation at break of the PU sponge layer are DIN EN ISO 1798: 2008; the aging condition is humid heat aging at 90 deg.C and (100-6)% relative humidity for 200 h.

TABLE 2 quality test data of composite skins of examples 1 to 2 and comparative examples 1 to 2

The detection standard and method for the aging resistance test of the composite epidermis are VW TL 496: 2016/specimen was aged at (90. + -. 2) ° C and (98. + -. 2)% relative humidity for 216 hours and then evaluated.

The test standard and method for peel force testing is climate change according to PV 2005. The sample width is 50mm, the length is 200mm, 10 blocks of warp and weft are respectively used for testing the stripping strength after climate alternation, and the stripping test method is DIN 53357 and 2003.

As can be seen from table 2, the composite skin prepared by flame lamination using the novel polyurethane flame laminated sponge has the advantages and characteristics of both the polyether polyurethane sponge and the polyester polyurethane sponge, and the examples 1 and 2 have the peeling force meeting the requirements of handrails under the condition of using the same flame laminating agent as the polyether polyurethane sponge; compared with polyester polyurethane sponge, the polyurethane sponge has better aging resistance, and after aging, the tensile strength and the elongation at break are reduced by 20% compared with those under the conventional condition; simultaneously this compound epidermis can directly laminate with the car handrail working of plastics, because need not to increase the extensibility that the backer has increased the epidermis, the utility model discloses a compound epidermis has gained better technological effect in the application of car handrail.

Claims (3)

1. The composite skin for the automobile handrail is characterized by sequentially comprising a PVC layer (1) and a PU sponge layer (2) from top to bottom; wherein the content of the first and second substances,

a) one surface of the PVC layer (1) is in composite fit with one surface of the PU sponge layer (2) through flame; PVC is polyvinyl chloride artificial leather;

b) the PU sponge layer (2) is polyurethane flame composite sponge; the tensile strength of the polyurethane flame composite sponge is 150-200 Kpa, and the elongation at break is not less than 200%.

2. The composite skin for automobile armrests according to claim 1, wherein the thickness of the PVC layer (1) is 0.7-1.2 mm.

3. The composite skin for automobile armrests according to claim 1, wherein the thickness of the PU sponge layer (2) is 3-9 mm.

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