JPS6048347A - Laminating material for interior finish of car, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention uses an ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA) or EVA and polyethylene as main components, a rubber component, a tackifying resin, a flame retardant, a fatty acid amide, polyethylene glycol, This product relates to a laminate material for the interior of vehicles, etc., in which a woven or knitted fabric is backed with a composition containing a processability improver selected from hydrogenated castor oil. In recent years, the skin of interior materials such as ceilings, seats, and door trims of automobiles and other vehicles has been used to provide a sense of luxury or to improve livability. In order to do this, woven or knitted fabrics such as Polynysterte 11 are increasingly being used. However, since woven and knitted fabrics are breathable, they act as filters and are highly susceptible to contamination. Plastic sheet backing has been considered as a method of preventing air permeability in woven and knitted fabrics, and is currently being used in some cases, but this has not always been satisfactory. The performance required for a backing material is to adhere well to woven or knitted fabrics, and not to damage the texture of woven or knitted fabrics, that is, to have good strength, flexibility, elasticity, heat resistance, and workability during interior decoration. In addition, it is necessary to have flame retardant properties.Specifically, the backing of polyvinyl chloride sheet is mentioned as the one currently used. Since it does not adhere well to fabrics or knitted fabrics, adhesive must be used. Furthermore, it has the disadvantage of impairing the feel of woven and knitted fabrics due to problems such as elasticity. Furthermore, in recent years there has been a call for the weight of automobiles to be reduced in order to improve fuel efficiency, but polyvinyl chloride (PVC) is an inferior plastic material, and it also poses problems in terms of reducing the weight of automobiles. .

A backing made of an acrylic resin emulsion has been considered, but since it is an emulsion, it has the problem that the backing must be fairly thick in order to prevent air permeability.

The inventors of the present invention have repeatedly conducted research to develop a material that satisfies all of the above performances as a backing material, and have previously developed EVA.
...Mata's main components are EV, A, and polyethylene, as well as adhesive resin, flame retardant, and fatty acid amide.

By using a composition containing a processability improver selected from polyethylene glycol and hydrogenated castor oil as a 7-inch printing material, breathability can be achieved without impairing the texture of woven or knitted fabrics or the workability of interior decoration. A patent was filed for an interior material that prevents this. (Japanese Patent Application No. 57-43715) Although the present invention has superior characteristics compared to polyvinyl chloride and Ac-11 emulsion, it cannot necessarily be said that it has sufficient performance. Therefore, the present inventors conducted further intensive research and arrived at the present invention. That is, the present invention is directed to EVA or EVA containing polyethylene up to 30 cm
It consists of VA, and the vinyl acetate content contained in the whole is 5.
~30% by weight, resin component 4()~94% by weight, rubber component 3~30% by weight, tackifying resin with a ring and ball softening point of 95~140°C, 3~30% by weight, melting point of 90°C or higher or,
3 to 50% by weight of a flame retardant with a ring and ball softening point of 95°C or higher based on the total value of the resin component, rubber component, and tackifying resin, a processability improver selected from fatty acid amide, polyethylene glycol, and hydrogenated castor oil. 0.05 to 2% by weight based on the total base of the resin component, the rubber component, and the tackifying resin, and has a melt flow rate of 2 to 1 (10 g/10 minutes). This is an anti-layer material for the interior of vehicles, etc., which is made by backing a woven or knitted fabric with a thickness in the range of ~150 μm.

To describe the present invention more specifically, the physical properties of EVA or a mixture of EVA and polyethylene, which is the main component of the backing material of the present invention, vary greatly depending on the vinyl acetate content contained therein. The vinyl acetate content is limited to those having a specific vinyl acetate content, specifically, the vinyl acetate content is limited to 5 to 30% by weight, preferably 7 to 25% by weight, and the vinyl acetate content is 5% by weight or less. and poor adhesion to woven or knitted fabrics, flexibility,
It is undesirable because it reduces elasticity and workability during interior decoration. Moreover, when the vinyl acetate content is 30% by weight or more,
Although it has good adhesion to woven or knitted fabrics, flexibility, stretchability, and workability during interior decoration, it has no heat resistance, so it soaks into woven or knitted fabrics at high temperatures, making it unfavorable. Also, the ratio of gVA and polyethylene is E
VA100-70 wt%, polyethylene 0-30
If the polyethylene content is 30% by weight or more, flexibility, stretchability, and workability during interior decoration will deteriorate, which is undesirable. Polyethylene here refers to low-density polyethylene and medium-density polyethylene.

It refers to high-density polyethylene, linear low-strength polyethylene, etc., and preferably low-density polyethylene.

The rubber component is an essential component for the purpose of adding flexibility and heat resistance.Specifically, the rubber component is a homopolymer and/or obtained by polymerizing natural rubber and/or a diene monomer. A copolymer of a genomic monomer and a copolymerizable monomer and/or an olefin thread elastomer, such as butadiene copolymer,
Rolobrene rubber, imprene rubber, styrene-butadiene copolymer, methylenebutadiene, styrene block copolymer, styrene-isoprene co-base, styrene-
Isoprene-styrene block copolymer.

Examples include acrylonitrile-butadiene co-compound, ethylene-propylene rubber, etc., and these can be used singly or in a mixture of two or more. In addition, the g0 ratio of the rubber component is based on the total amount of the resin component, adhesive resin, and rubber component.
When the proportion of the rubber component is 3% to 30%, preferably 5% to 20%, the flexibility and heat resistance are perfect. Moreover, if the thickness is 3 () or more, not only the adhesion to the woven or knitted fabric 1 decreases, but also the workability of the backing process 1 is also decreased, which is not preferable.

The tackifying resin is an essential component for adding flexibility to fabrics or knitted fabrics. Specifically, the appeasement note (
To describe the fats, I would say Togo Rosin, Mizuna Rosin, Rosin Ester, etc., or Rosin@conductors, terpene resins, terpene modified products, aliphatic hydrocarbons), aromatic hydrocarbons, etc. Examples include fats, fatty acid group hydrocarbon resins, etc., and these resins can be used singly or as a mixture of two or more, but it is essential to use those having a ring and ball softening point of 95 to 140°C. That is, if the ring and ball softening point is 95° C. or lower, it is undesirable because it has no heat resistance and will soak into woven fabrics or knitted fabrics at high temperatures, resulting in poor air permeability. Moreover, if the ring and ball softening point is 140° C. or higher, the compatibility with the resin component will be lowered, resulting in lowered strength, flexibility, elasticity, and workability during interior decoration, which is not preferable. The proportion of the tackifying resin is 3 to 30% by weight, preferably 5 to 20% by weight, based on the total amount of the resin component, the rubber component, and the tackifying resin. The proportion of the tackifying resin is 3%
If it is less than 30% by weight, the adhesion to the woven or knitted fabric will decrease, which is undesirable, and if it exceeds 30% by weight, not only will no improvement in the adhesion to the woven or knitted fabric be observed.
Rather, it is undesirable because it has problems such as a decrease in compatibility with the resin component and a decrease in workability during backing processing. S', NO, 302), and the laminate of the present invention also needs to pass flame retardant standards. For this purpose, it is necessary to make the woven or knitted fabric flame retardant, but unless the backing material is made flame retardant, it will be difficult for the fabric to pass the flame retardant standards. Therefore, a flame retardant is an essential component in the present invention. Here, the flame retardant must be selected to have heat resistance, and must have a melting point of 90° C. or higher or a ring and ball softening point of 95° C. or higher. Specific examples of flame retardants include chlorinated paraffin, chlorinated polyethylene, and perchloropentacyclodecane.

hexabromobenzene, pentabromoethylbenzene,
Tetrabromobisphenol A, tetrabromophthalic anhalide, tetrabromophosphalic anhalide, hexabromodiphenyl ether, pentabromodiphenyl ether.

Decabromodiphenyl ether, To'Js(2,3
-difuromobrovir) isocyanurate, 2,2-bis(4-hydroxyl 3,5-dibromophenyl)propane, ethylenebistri(2-cyanoethyl)phosphonium bromide, aluminum hydroxide, etc. Can be used in mixtures of more than one type. Further, when these flame retardants and antimony trioxide are used in combination, the flame retardant effect is further improved. In addition, the amount of flame retardant added is
The amount is 3 to 50% by weight, preferably 4 to 40% by weight, based on the total amount of the resin component, rubber component, and tackifying resin.

If it is less than 3% by weight, the flame retardant effect will not be improved, which is not preferable. Moreover, the flame retardant effect is sufficient at 50 times more than that, and there is no need to add more.

The processability improver in the present invention plays the role of preventing blocking of the product, improving the stickiness of the product, and is an essential component of the composition of the present invention. Specific examples of processability improvers include fatty acid amides such as oleic acid amide, stearic acid amide, erucic acid amide, polyethylene glycol, hydrogenated castor oil, and the like. Can be used.

The amount of these processability improvers added is 0.05 to 2% by weight based on the total amount of the resin component, rubber component, and tackifying resin.
and preferably 0.1-1% by weight. If the amount added is less than 1.05% by weight, the effect of addition is small and the effect as a processability improver is not exerted, which is not preferable.2
If it exceeds % by weight, it is not preferable because the adhesion strength to woven or knitted fabrics decreases.

In the present invention, the melt flow rate of the composition must also be specified. The melt flow rate of the composition is 2 to 100, as measured by the melt flow rate measuring method specified in JIS K6730. i' /
10 minutes, preferably in the range of 5 to 60.9/10 minutes. If the melt flow rate is less than 2 g/10 minutes, the layering properties to woven or knitted fabrics will be poor, and the flexibility, stretchability,
This is not preferable because it impairs workability during interior decoration. 10 more
When it is 0 g/10 minutes or more, heat resistance decreases and it cannot be used.

Furthermore, in the present invention, the thickness of the composition must be specified when backing the composition to a woven or knitted fabric. The thickness of the composition ranges from 20 to 150 mm;
If it is less than 0 μm, pinholes etc. in the composition sheet may cause
This is not preferable because the effect of preventing air permeability is weakened. Also 15
If it is 0 μm or more, the flexibility and stretchability of the woven or knitted fabric and the workability during interior decoration are impaired, which is not preferable.

The composition of the present invention can be easily produced by pre-mixing a predetermined amount of the constituent components in a solid state, and then bath-melting and shear-mixing them using a heated roll, roll mixer, or extruder. . Also necessary is 16 points 2,6-pieces
-Antioxidants such as butylparacresol can also be added.

The backing for the woven or knitted fabric in the present invention is carried out in advance by the inflation method, which is generally used in the industry.
A sort of the composition is prepared by the lr die method, calendar method, etc., and this sort is subjected to thermal lamination,
It is obtained by bonding using means such as heat pressing. Alternatively, it can also be obtained by directly backing the composition onto a woven or knitted fabric by extrusion lamination. The extrusion lamination method is a simpler method because backing can be done in one step.

A laminate material for interior decoration made by backing a woven or knitted fabric with the composition of the present invention can prevent air permeability of the woven or knitted fabric without impairing the feel of the woven or knitted fabric or workability during interior decoration. Furthermore, since backing can be performed using commonly used processing methods, extremely effective laminated materials can be provided. Further, one of the characteristics of the composition according to the present invention is that it can be processed in a healthy manner.

EXAMPLES The present invention will be specifically explained below with reference to Examples.

Examples] Vinegar C cast vinyl 20 heavy needle yvh 75% by weight, Echire Thief I Kobyren Rubber (product name JSREP-02P)
111 heavy nails, 15 heavy feet of alicyclic hydrocarbon resin (trade name Alcon P-125) with a softening point of 125°C, and 1 heavy foot of tetrabromobisphenol Al with a melting point of 180°C. %, ff-/lz force saponamide 0
．． Two weights were mixed and cross-extruded using an extruder to form pellets. The melt flow rate of this pellet & 2B &
/10 minutes. This composition was prepared using a cylinder with a diameter of 115 mm, L, /D = 25 mm. Using an extruder equipped with a straight manifold die (resin temperature: 240° C., take-off speed: 2), backing was performed on the teltricot to a thickness of 50 μm.

Example 2 The composition of Example 1 was applied to a cylinder with a diameter of 40 mm. L/D=22
A 50 μm casting film was obtained using an extruder. This film was thermocompressed using a thermal laminator (compression temperature: 130° C., line speed: 5 m/min) to form a backing on polyester triconte.

Example 3 As a rubber component, a styrene-phtadiene-styrene block copolymer (trade name Kaliflex Ta-KX-65) was used.
Pelletization was carried out in the same manner as in Example 1, except that > was used. The melt flow rate of this pellet is 1
It took 8&/10 minutes. This composition was subjected to backing twice in the same manner as in Example 1.

Comparative Example 4 Except that the tackifying resin used in Example 1 was 2% by weight,
Pelletization was performed in the same manner as in Example 1. The melt flow rate of this pellet was 16 y/l()min. This composition was subjected to backing in the same manner as in Example 1.

Example 4 Vinyl acetate lid 28 weight EVA, 70% by weight.

Pelletization was carried out in the same manner as in Example 1, except that 15-layered low-density polyethylene with a j&i degree of 0.921 was used. The melt flow rate of this pellet was 259/10 minutes. This composition was subjected to backing in the same manner as in Example 1.

Example 5 Pelletization was carried out in the same manner as in Example 3, except that tetrabromodiphenyl having a melting point of 3111'C was used as a flame retardant. The melt flow rate of this pellet is 18.9/
This composition was used for backing in the same manner as in Example 1.

Comparative Example 1 Pelletization was carried out in the same manner as in Example 1 except that EVA having a vinyl acetate content of 35% by weight was used. The melt flow rate of this pellet is 5o! It was j/1o minute. Example 1 except that the resin temperature during processing of this composition was 160°C.
In the same way, I performed Noo King.

Comparative Example 2 Pelletization was carried out in the same manner as in Example 1, except that a side ring hydrocarbon resin (product name: Alcon P-70) having a ring and ball softening point of 70° C. was used as the tackifying resin.

The melt flow rate of this pellet is 27 g/i.

It was a minute. This composition was subjected to backing in the same manner as in Example 1.

Comparative Example 3 Pelletization was carried out in the same manner as in Example 1 except that the flame retardant used in Example 1 was used in double f%. The melt flow rate of this pellet was 28.12/zO min. 4 ml of this composition was strained with Example 1 for backing.

Comparative Example 5 Backing was performed in the same manner as in Example 1 except that the backing thickness was 200 μm.

The measurements of the laminates described in the Examples and Comparative Examples are shown in the table below.

Claims (1)

[Claims] 11 Resin component consisting of ethylene-vinyl acetate copolymer or ethylene-vinyl acetate copolymer containing polyethylene up to 30% by weight, with a total vinyl acetate content of 5-30% by weight 40-940-94% by weight 3 to 30 weights! 1%
, tackifier resin with a softening point of 95-140°C 3-30
% by weight, flame retardant with a melting point of 9()°C or higher or a ring and ball softening point of 95°C or higher based on the total amount of the resin component, rubber component, and tackifying resin, fatty acid amide, polyethylene glycol , a processability improver selected from hydrogenated castor oil is added to the total amount of the resin component, rubber component, and tackifying resin in an amount of 0. (It is made by backing a woven or knitted fabric with a composition characterized in that it contains 15 to 2 layers of water and has a melt flow rate of 2 to 1001/10 minutes to a thickness in the range of 2 () to 15 () μm). Laminated materials for the interior of vehicles, etc.