JPS6066783A - Production of skin integrated seat - Google Patents
Production of skin integrated seatInfo
- Publication number
- JPS6066783A JPS6066783A JP58176030A JP17603083A JPS6066783A JP S6066783 A JPS6066783 A JP S6066783A JP 58176030 A JP58176030 A JP 58176030A JP 17603083 A JP17603083 A JP 17603083A JP S6066783 A JPS6066783 A JP S6066783A
- Authority
- JP
- Japan
- Prior art keywords
- skin
- cushion body
- groove
- seat
- frequency welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
- B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
- B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/771—Seats
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の対象〕
本発明は自動車シートの、表皮一体化座席の製造方法に
関するもので、特に表皮とウレタンよりなるクッション
体の製造方法に関するものである（１）
〔本発明の利用分野〕
本発明による、クッション体の製造方法は、表皮とクッ
ション体との加工時間が短縮され、加工設備も簡単であ
り、ウレタンを使用した各種のシートの製造に利用出来
るものである。[Detailed Description of the Invention] [Subject of the Invention] The present invention relates to a method for manufacturing an automobile seat with an integrated skin, and particularly to a method for manufacturing a cushion body made of a skin and urethane (1) [Book] Field of Application of the Invention] The method for manufacturing a cushion body according to the present invention shortens the processing time for the skin and the cushion body, and the processing equipment is simple, so it can be used for manufacturing various types of seats using urethane. .
シート用クッション体の一体化について、高周波その他
の適宜加熱手段により、一体に成形するクッション材と
一体化座席の製法については、特開昭５４−１５２５５
７号「クッション材と一体化した座席の製法」の公報に
記載されたものかある。これによれば、熱融着性ワディ
ングの上面に表皮を載置すると共に、下面にクッション
材を配在させ、融着部に融着型を置いて高周波その他の
加熱手段により融着して、表皮、熱融着性ワイング、ク
ッション材またはモールドおよび裏布とを一体成形した
ことを特徴とするクッション材と一体化座席の製法が記
載しである。Regarding the integration of a seat cushion body, a method for manufacturing a cushion material and an integrated seat by integrally molding the cushion material using high frequency or other appropriate heating means is disclosed in Japanese Patent Application Laid-Open No. 54-15255.
It is described in the publication No. 7 ``Method for manufacturing seats integrated with cushioning material''. According to this, a skin is placed on the upper surface of the heat-fusible wadding, a cushioning material is arranged on the bottom surface, a fusion mold is placed in the fusion part, and the skin is fused using high frequency or other heating means. A method for manufacturing a seat integrated with a cushioning material is described, which is characterized in that a skin, a heat-fusible wine, a cushioning material or a mold, and a backing fabric are integrally molded.
〔従来技術の問題点及びその技術的分析〕（２）
この従来の前記クッション材の一体化については、座席
形状に形成したモールドウレタン又はスラブウレタン材
の融着部に粉末又は液状の融着剤を含浸させて表皮とモ
ールドウレタン又はスラブウレタン材のクッション体を
積層し表皮とクッション体を一体化しているが、
（１）粉末又は液状の融着剤を含浸させるための含浸工
程に大型な設備を必要とし、
（２）含浸工程に時間がかかり、
（３）融着剤が均一にモールドウレタン又はスラブウレ
タン剤に浸透することが難しく、その結果、含浸むらに
よる均一な融着が困難であり・
（４）粉末又は液状の融着剤を含浸して融着した場合に
、融着剤の大部分は含浸部内で固化し、その一部が含浸
部より溶は出し、接合する相手部材と接着するにすぎな
いため、接着力が小さい、
という欠点があった。[Problems in the prior art and their technical analysis] (2) Regarding the integration of the conventional cushioning material, a powder or liquid adhesive is applied to the fused portion of the molded urethane or slab urethane material formed in the shape of the seat. The skin and the cushion body are laminated by impregnating the skin with molded urethane or slab urethane material, and the skin and the cushion body are integrated. (1) Large-scale equipment is required for the impregnation process to impregnate the powder or liquid adhesive. (2) The impregnation process takes time; (3) It is difficult for the fusion agent to penetrate the mold urethane or slab urethane agent uniformly; as a result, uniform fusion is difficult due to uneven impregnation.・ (4) When welding by impregnating a powder or liquid adhesive, most of the adhesive solidifies within the impregnated area, and some of it melts out from the impregnated area and forms a bond with the mating material to be joined. Since it merely adheres, it has the disadvantage of low adhesive strength.
〔技術的課題〕
（３）
そこで本発明は、シートの表皮とクッション本体の融着
において、従来実施されていた、融着剤の含浸工程を省
略して、加工時間を短縮すると共に、融着むらのない、
均一に融着したシートを製造することを、その技術的課
題とするものがある〔技術的手段〕
上記技術的課題を解決するために講じた技術的手段は、
表皮とクッション本体を融着するために、融着剤に替え
てナイロン又は、ｐｖｃシートの様な高周波融着性シー
トを使用するものである。[Technical Problems] (3) Therefore, the present invention omit the conventional process of impregnating a welding agent in fusing the seat skin and the cushion body, thereby shortening the processing time and improving the welding process. Even,
There is a technology whose technical problem is to manufacture a uniformly fused sheet [technical means] The technical means taken to solve the above technical problem are:
In order to fuse the outer skin and the cushion body, a high frequency adhesive sheet such as nylon or PVC sheet is used instead of the adhesive.
上記技術的手段は次のように作用する。すなわち、表皮
とクッション体の製法として、（１）モールドウレタン
のクッション本体の表面に表皮固定用及び意匠用の凹み
溝を設け、（２）前記溝パターンと同形状に打ち抜いた
、高周波融着性シート材又は同溝幅と同幅のシート材帯
を、クッション体の溝底部に全面に敷き、
（４）
（３）高周波下型の上にクッション体を固定し、（４）
座席カバー形状に、かまち部を構成した表皮又はラミネ
ート表皮をクッション体上に被覆セットし、
（５）高周波上型で表皮とクッション体を加圧しく６）
次に高周波融着を行い、
（７）高周波融着性シートが融着固化して、表皮とクッ
ション体を一体化する。The above technical means works as follows. That is, as a manufacturing method for the skin and cushion body, (1) recessed grooves for fixing the skin and for design are provided on the surface of the molded urethane cushion body, and (2) grooves are punched out in the same shape as the groove pattern and are high-frequency fusion bondable. Spread the sheet material or a sheet material band of the same width as the groove width over the entire bottom of the groove of the cushion body, (4) (3) Fix the cushion body on the high frequency lower mold, (4)
In the shape of a seat cover, cover the cushion body with the skin or laminate skin that forms the stile, and (5) pressurize the skin and the cushion body with a high-frequency upper mold (6).
Next, high frequency fusion is performed, and (7) the high frequency fusion sheet is fused and solidified to integrate the outer skin and the cushion body.
以上の方法により高周波融着性シート材の融着により表
皮とクッション体を一体化するものである。By the above method, the outer skin and the cushion body are integrated by fusing the high-frequency fusing sheet material.
本発明は、次の特有の効果を生じる。即ち、表皮とクッ
ション体の融着に、ナイロン等のシート帯の融着剤を使
用するために、表皮とクッション体の間に介在する融着
剤の絶対量が多く、高周波融着時に熔けた融着剤は同時
に表皮とクッション体双方の接合面全体に浸透し、強い
アンカー効果を発揮するために、接着力が極めて強く、
かつ均（５）
−に接着効果が発揮され、更に融合剤の含浸工程がなく
、大巾な加工時間の短縮が可能である。The present invention produces the following unique effects. In other words, because a nylon or other seat band adhesive is used to fuse the skin and cushion body, the absolute amount of adhesive interposed between the skin and the cushion body is large, and it is difficult to melt during high-frequency welding. The adhesive penetrates the entire joint surface of both the skin and the cushion body at the same time, creating a strong anchoring effect, resulting in extremely strong adhesion.
Moreover, the adhesion effect is uniformly exhibited, and there is no need for a step of impregnating a coalescing agent, making it possible to significantly shorten the processing time.
以下、上記技術的手段の一興体例を示す、実施例につい
て第１図〜第５図により説明する。Hereinafter, an embodiment showing an example of the above-mentioned technical means will be described with reference to FIGS. 1 to 5.
ｌはシートのクッション体で、モールドウレタン又はス
ラブウレタンより成形さ、その表面に表皮固定用、及び
意匠用の凹み溝２を設け、３はカバーで、表皮５．かま
ち６．玉縁７よりなり、ナイロン、ポリエステル又はそ
れらのラミネート材より構成されている。４はナイロン
又はＰｖｃよりなる０、３〜０．５鶴のシートを溝３と
同形状に打抜かれたものである。シート４に替り、シー
ト帯４ａ及び４ｂを溝部に載置しても良い、８は高周波
融着用の下型で、圧着用の凸部８ａがあり、９は高周波
融着用の上型で、溝部２と同形状をした圧着用及び電極
の凸部９ａがある。１０ａ、１０ｂは表皮とクッション
体の融着部である。1 is the seat cushion body, which is molded from molded urethane or slab urethane, and has a recessed groove 2 on its surface for fixing the skin and for design; 3 is a cover; and the skin 5. Stile 6. The bead 7 is made of nylon, polyester, or a laminate thereof. 4 is a sheet made of nylon or PVC with a thickness of 0.3 to 0.5 mm, which is punched out in the same shape as the groove 3. Instead of the sheet 4, sheet bands 4a and 4b may be placed in the groove. 8 is a lower mold for high frequency welding, and has a convex part 8a for crimping; 9 is an upper mold for high frequency welding, and the groove is There is a crimping and electrode convex portion 9a having the same shape as 2. 10a and 10b are fused parts between the outer skin and the cushion body.
上記構成において、クッション体１の溝２の上に、溝と
同形状に形成したシート４を載置し、り（６）
ツション体１を前記高周波融着用下型８に固定し、表皮
、かまち、玉縁よりなるカバー５をクッション体１の上
に被覆し、高周波融着用上型で加圧し、約１０秒〜２０
秒間高周波融着することにより、シート材と表皮とを一
体化した高周波融着の座席１１を製造するものである。In the above configuration, a sheet 4 formed in the same shape as the groove is placed on the groove 2 of the cushion body 1, and the tension body 1 is fixed to the lower die 8 for high frequency welding, and the outer skin and the stile are fixed. A cover 5 consisting of a beaded edge is placed on the cushion body 1, and pressure is applied with an upper mold for high frequency welding for about 10 seconds to 20 seconds.
A high-frequency welded seat 11 in which the sheet material and the skin are integrated is manufactured by high-frequency welding for seconds.
第１図はクッション体の斜視図、第２図は第１図のＡ−
Ａ断面図、第３図は表皮とクッション体の融着シートを
示すもので、（イ）は溝形状に打抜いた斜視図、（ロ）
は帯状のものを重ねる一部省略した斜視図、第４図は高
周波融着用、上型及び下型にてクッション体と表皮を加
圧している断面図、そして第５図は実施例の断面図であ
る。
ｌ・・・クッション体、２・・・溝、３・・・座席カバ
ー、４．４ａ、４ｂ・・・高周波融着シート、５・・・
表皮、８・・・高周波融着用下型、９・・・高周波融着
用上型、１１・・・表皮一体化座席
（７）
＊Ｉ＋
第２図
（イ） ４口）
第３図Figure 1 is a perspective view of the cushion body, Figure 2 is A- in Figure 1.
A sectional view and Figure 3 show the fused sheet of the skin and cushion body, (a) is a perspective view punched out in a groove shape, (b)
4 is a partially omitted perspective view of overlapping belt-shaped materials, FIG. 4 is a cross-sectional view showing pressure applied to the cushion body and the skin using the upper and lower molds for high-frequency fusion, and FIG. 5 is a cross-sectional view of the embodiment. It is. l...Cushion body, 2...Groove, 3...Seat cover, 4.4a, 4b...High frequency fusion sheet, 5...
Skin, 8...Lower mold for high frequency fusion, 9...Upper mold for high frequency fusion, 11...Seat with integrated skin (7) *I+ Figure 2 (A) 4 ports) Figure 3
Claims (1)
よりなる座席の表面部に、表皮固定用及び意匠用の溝を
設け、前記溝と同形状をしたナイロン又は塩ビよりなる
高周波融着性シート、又は前記溝と同幅のシート帯を、
前記溝の全面に敷きつめ、座席カバー形状に縫製した表
皮又はラミネート表皮を前記クッション体に被覆し、高
周波融着用の下型に固定し、前記溝形状と同一の形状を
した高周波融着用上型で加圧後、高周波融着して表皮と
クッション体接合して成る表皮一体化座席の製造方法。A groove for fixing the skin and for design is provided on the surface of the seat made of a cushion body made of molded urethane or slab urethane material, and a high-frequency welding sheet made of nylon or PVC having the same shape as the groove, or a high-frequency welding sheet made of nylon or vinyl chloride having the same shape as the groove is provided. A sheet band of the same width,
The cushion body is covered with a skin or a laminated skin that is spread over the entire surface of the groove and sewn into the shape of a seat cover, and is fixed to a lower mold for high frequency welding, and an upper mold for high frequency welding that has the same shape as the groove shape. A method for manufacturing a seat with an integrated skin, in which the skin and cushion body are joined by high-frequency welding after pressurization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58176030A JPS6066783A (en) | 1983-09-23 | 1983-09-23 | Production of skin integrated seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58176030A JPS6066783A (en) | 1983-09-23 | 1983-09-23 | Production of skin integrated seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6066783A true JPS6066783A (en) | 1985-04-16 |
Family
ID=16006497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58176030A Pending JPS6066783A (en) | 1983-09-23 | 1983-09-23 | Production of skin integrated seat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6066783A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019116864A1 (en) * | 2017-12-12 | 2019-06-20 | 株式会社ブリヂストン | Polyurethane foam for high-frequency welding, laminate, and production method therefor |
-
1983
- 1983-09-23 JP JP58176030A patent/JPS6066783A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019116864A1 (en) * | 2017-12-12 | 2019-06-20 | 株式会社ブリヂストン | Polyurethane foam for high-frequency welding, laminate, and production method therefor |
| JP2019104827A (en) * | 2017-12-12 | 2019-06-27 | 株式会社ブリヂストン | Polyurethane foam for high frequency welding, laminate, and method for producing the same |
| CN111448249A (en) * | 2017-12-12 | 2020-07-24 | 株式会社普利司通 | Polyurethane foam for high-frequency welding, laminate, and production method therefor |
| EP3725831A4 (en) * | 2017-12-12 | 2021-09-01 | Bridgestone Corporation | Polyurethane foam for high-frequency welding, laminate, and production method therefor |
| CN111448249B (en) * | 2017-12-12 | 2023-02-28 | 株式会社亚科迈 | Polyurethane foam for high-frequency welding and laminate |
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