CN214266936U - Composite skin for automobile seat - Google Patents

Abstract

The utility model relates to a car seat is with compound epidermis, the compound epidermis of mainly solving among the prior art trompil leather has compound epidermis to peel off when the dynamic height in car seat's application, can not satisfy simultaneously that ageing-resistant performance is good, the smell is low, compound epidermis tear strength, tensile tear powerful not decline problem. The novel composite skin for the automobile seat sequentially comprises a first leather layer 1, a first glue layer 2, a first fabric layer 3, a first sponge layer 4 and a second fabric layer 5 from top to bottom; wherein, the technical scheme that the first layer of sponge 4 is polyurethane flame composite sponge better solves the problem and can be used in the industrial application of the automobile seat.

Description

Composite skin for automobile seat

Technical Field

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

Background

At present, polyester type sponge or polyether type sponge is usually adopted as a composite skin of an automobile seat, and the density of the sponge is generally required to be 35-45 kg/m³The peel force is not less than 10N/5 cm. When the polyester type PU sponge is used, PVC and base fabric can be directly attached by a flame composite processing mode, although the physical performance of the polyester type PU sponge is superior, the aging resistance of the polyester type PU sponge is poor, the related mechanical properties (tensile strength and elongation at break) of the polyester type PU sponge can be reduced by 40-50% under the conditions of high temperature and high humidity, and meanwhile, the polyester type PU sponge needs to be foamed by high-pressure equipment, so that the requirement on a foaming process is high, and the cost is high; because of high requirements on the foaming process, defective products are easily generated, and the yield is low. When the polyether type sponge is used, a flame complexing agent is required to be added, PVC and knitted fabric are attached in a flame complexing processing mode, the polyether type sponge has good aging resistance, and related mechanical properties of the polyether type sponge are basically not greatly influenced under the conditions of high temperature and high humidity; however, the polyether sponge needs to have a relatively large amount of flame retardant to generate a peeling force meeting the requirement after being attached, and the flame retardant contains a large amount of small molecular substances which are easy to volatilize, so that the produced sponge has a large smell and a high total amount of VOC (volatile organic Compounds), 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.

In practical application, for better comfortable experience, improve the air permeability of seat, can choose for use the epidermis that punches the leather as the seat. However, the leather is perforated, which results in a reduction in the tensile breaking strength and tear strength of the composite skin physical properties. Therefore, a composite skin for a seat having good air permeability and free from influence on tearing strength and tensile breaking strength is required.

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.

Disclosure of Invention

The utility model aims to solve the technical problem that, exist among the prior art and punch the automobile after leather and sponge are compound when the compound epidermis is peeled off the dynamic height with the car, can not satisfy the problem that ageing-resistant performance is good, the smell is low, compound epidermis tears powerful decline simultaneously, provide a new automobile seat with compound epidermis, this epidermis has excellent ageing-resistant performance, low smell, tears powerful advantage that does not descend simultaneously when can having higher peeling strength.

In order to solve the technical problem, the utility model discloses a technical scheme as follows: the composite skin for the automobile seat is characterized by sequentially comprising a first leather layer 1, a first glue layer 2, a first fabric layer 3, a first sponge layer 4 and a second fabric layer 5 from top to bottom; wherein the content of the first and second substances,

one side of the first leather layer 1 is attached to one side of the first fabric layer 3 through the first glue layer 2;

the other side of the first fabric layer 3 is in composite fit with one side of the first sponge layer 4 through flame; the first sponge layer 4 is polyurethane flame composite sponge;

one side of the second fabric layer 5 is in composite fit with the other side of the first sponge layer 4 through flame.

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;

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 first leather layer 1 is selected from PVC, PU or microfiber leather; the thickness of the first leather layer 1 is 1.1-1.5 mm.

In the technical scheme, preferably, the first leather layer 1 is uniformly perforated, the aperture is 0.8-1.0 mm, and the hole spacing is 2.0-3.0 mm.

In the above technical solution, preferably, the first glue layer 2 is selected from PUR or EVA glue; the thickness of the first glue layer is 0.05-0.09 mm.

In the above technical scheme, preferably, the thickness of the first sponge layer 4 is 2-8 mm.

In the above technical solution, preferably, the first fabric layer 3 is selected from one of warp knitting fabric and weft knitting fabric, and has a thickness of 0.6-0.9 mm.

In the above technical solution, preferably, the second fabric layer 5 is selected from one of warp knitting fabric and weft knitting fabric, and has a thickness of 0.6-0.9 mm.

The utility model provides a new car seat is with compound epidermis adds to car compound epidermis 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 polyether type sponge and polyester sponge's advantage. When the flame-retardant composite skin is attached to a fabric, the prepared composite skin can have the stripping force (15.7N/5cm) required by compounding only by adding a small amount of flame complexing agent, and simultaneously, the skin after compounding has low odor (3.7 grade), and the sponge layer has good aging resistance (the tensile strength is 200N before aging; the elongation at break is 212%, the tensile strength is 163N after aging; the elongation at break is 171%); and secondly, by compounding a layer of fabric after punching the leather, the reduction of tensile breaking strength and tearing strength caused by punching is compensated, and a better technical effect is obtained.

Drawings

FIG. 1 is a schematic view of a composite skin for an automotive seat.

In the attached figure 1, 1 is a first leather layer, 2 is a first glue layer, 3 is a first fabric layer, 4 is a first sponge layer, and 5 is a second fabric layer.

Figure 2 is a schematic plan view of the first leather 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 seat comprises a PVC layer 1 (thickness is 1.2 mm; aperture is 0.8mm, hole distance is 2.0mm), a PUR glue layer 2 (thickness is 0.06mm), a knitted warp knitting fabric layer 3 (thickness is 0.7mm), a polyurethane flame composite sponge 4 (thickness is 3.0mm) and a knitted weft knitting fabric layer 5 (thickness is 0.6mm) from top to bottom in sequence. The PVC layer 1 is attached to the knitting warp knitting cloth layer 3 through PUR glue 2; the polyurethane flame composite sponge 4 is respectively jointed with the warp knitting fabric layer 3 and the weft knitting fabric layer 5 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: 2.25 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 seat comprises a PU layer 1 (thickness is 1.1 mm; aperture is 0.8mm, hole distance is 2.0mm), a PUR glue layer 2 (thickness is 0.06mm), a knitted warp knitting fabric layer 3 (thickness is 0.7mm), a polyurethane flame composite sponge 4 (thickness is 4.0mm) and a knitted weft knitting fabric layer 5 (thickness is 0.6mm) from top to bottom in sequence. The PU layer 1 is attached to the knitted warp knitting fabric layer 3 through PUR glue 2; the polyurethane flame composite sponge 4 is respectively jointed with the warp knitting fabric layer 3 and the weft knitting fabric layer 5 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 for an automobile seat comprises a PVC layer 1 (thickness 1.2 mm; aperture 0.8mm, pitch 2.0mm), a PUR glue layer 2 (thickness 0.06mm), a knitted warp knitting fabric layer 3 (thickness 0.7mm), a polyester sponge 4 (thickness 3.0mm) and a knitted weft knitting fabric layer 5 (thickness 0.3mm) from top to bottom in sequence. The PVC layer 1 is attached to the knitting warp knitting cloth layer 3 through PUR glue 2; the polyester sponge 4 is respectively attached to the warp knitting fabric layer 3 and the weft knitting fabric layer 5 through a flame compounding process, the physical characteristics of the polyester sponge layer are shown in table 1, and the skin quality detection data after compounding are shown in table 2.

[ COMPARATIVE EXAMPLE 2 ]

A composite surface skin for an automobile seat comprises a PU layer 1 (thickness is 1.0 mm; aperture is 0.8mm, pitch is 2.0mm), a PUR glue layer 2 (thickness is 0.06mm), a knitted warp knitting fabric layer 3 (thickness is 0.7mm), a polyether sponge 4 (thickness is 4.0mm) and a knitted weft knitting fabric layer 5 (thickness is 0.3mm) from top to bottom in sequence. The PU layer 1 is attached to the knitted warp knitting fabric layer 3 through PUR glue 2; the polyurethane sponge 4 is respectively attached to the warp knitted fabric layer 3 and the weft knitted fabric layer 5 through a flame compounding process, the physical characteristics of the polyether sponge layer are shown in table 1, and the skin quality detection data after compounding are shown in table 2.

[ COMPARATIVE EXAMPLE 3 ]

A composite skin for an automobile seat comprises a PVC layer (with the thickness of 1.2mm, the aperture of 0.8mm and the hole distance of 2.0mm), a polyurethane flame composite sponge (with the thickness of 3.0mm) and a non-woven fabric layer (with the thickness of 0.4mm) from top to bottom in sequence. The polyurethane flame composite sponge is respectively attached to the PVC layer and the non-woven fabric layer 5 through a flame composite process.

The preparation method of the polyurethane flame composite sponge refers to example 1, and the formula of each component is not changed; 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.

TABLE 1 physical characteristics of the sponge layers in examples 1-2 and comparative examples 1-2

The tensile strength and the elongation at break of the sponge layer are tested according to 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 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.

The tear strength of the composite skin is in accordance with DIN 53356 and the tensile break strength is in accordance with DIN EN 13934-1-1999.

As can be seen from table 2, the composite skins for the car seats prepared by compounding the novel polyurethane flame-compounded sponge have the advantages of both the polyether type sponge and the polyester type sponge, and the examples 1 and 2 have the required peeling force under the condition of using the same flame-compounding agent as the polyether type 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; meanwhile, after the punched leather is compounded with a layer of fabric, the tearing strength and the tensile tearing strength of the compounded surface can meet the use requirements, and a better technical effect is achieved in the application of the automobile seat.

Claims (7)

1. The composite skin for the automobile seat is characterized by sequentially comprising a first leather layer (1), a first glue layer (2), a first fabric layer (3), a first sponge layer (4) and a second fabric layer (5) from top to bottom; wherein the content of the first and second substances,

a) one surface of the first leather layer (1) is attached to one surface of the first fabric layer (3) through the first glue layer (2);

b) the other side of the first fabric layer (3) is in composite fit with one side of the first sponge layer (4) through flame; the first sponge layer (4) is polyurethane flame composite sponge, the tensile strength of the polyurethane flame composite sponge is 150-200 Kpa, and the elongation at break of the polyurethane flame composite sponge is not less than 200%;

c) one side of the second fabric layer (5) is in composite fit with the other side of the first sponge layer (4) through flame.

2. The composite skin for vehicle seats according to claim 1, characterized in that said first leather layer (1) is selected from PVC, PU or microfiber leather; the thickness of the first leather layer (1) is 1.1-1.5 mm.

3. The composite skin for the automobile seat according to claim 2, characterized in that the first leather layer (1) is uniformly perforated with 0.8-1.0 mm of pore diameter and 2.0-3.0 mm of pore space.

4. The composite skin for automobile seats according to claim 1, wherein the first glue layer (2) is selected from one of PUR or EVA glue; the thickness of the first glue layer is 0.05-0.09 mm.

5. The composite skin for automobile seats according to claim 1, characterized in that the thickness of the first sponge layer (4) is 2-8 mm.

6. The composite skin for the automobile seat according to claim 1, wherein the first fabric layer (3) is selected from one of a warp knitted fabric and a weft knitted fabric, and has a thickness of 0.6-0.9 mm.

7. The composite skin for an automobile seat according to claim 1, wherein the second fabric layer (5) is selected from one of a warp knitted fabric and a weft knitted fabric, and has a thickness of 0.6-0.9 mm.

Images