阅读说明：本技术 纤维板的制造方法 (The manufacturing method of fiberboard ) 是由 花谷和俊 赤尾昌哉 永塚裕介 于 2018-04-18 设计创作，主要内容包括：本发明的目的在于提供一种能够以较宽范围的加热温度和较宽范围的加压和加热时间得到高弯曲强度和高刚性的纤维板的制造方法。本发明通过使芯鞘型复合纤维聚集而形成纤维网后,将该纤维网在厚度方向压缩并加热,使该鞘成分软化或熔融,使该芯鞘型复合纤维相互间融合,成型为平板状,从而得到由三点弯曲试验得到的初始弯曲弹性模量为300MPa以上的纤维板,所述芯鞘型复合纤维的芯成分由乙二醇和对苯二甲酸所形成的共聚物构成,鞘成分由乙二醇、己二酸、对苯二甲酸、间苯二甲酸和/或二乙二醇所形成的共聚物构成。(The purpose of the present invention is to provide the manufacturing methods that one kind can obtain the fiberboard of high bending strength and high rigidity with the pressurization and heating time of the heating temperature of wider range and wider range.By the present invention in that sheath-core type conjugate fiber aggregation and after forming web, the web is compressed and heated in thickness direction, it is softened or melted the sheath ingredient, merge the sheath-core type conjugate fiber each other, it is shaped to tabular, to obtain the fiberboard that the initial bending elasticity modulus obtained by three point bending test is 300MPa or more, the core component of the sheath-core type conjugate fiber is formed by copolymer by ethylene glycol and terephthalic acid (TPA) and constitutes, sheath ingredient is by ethylene glycol, adipic acid, terephthalic acid (TPA), M-phthalic acid and/or diethylene glycol are formed by copolymer composition.)

1. a kind of manufacturing method of fiberboard, after forming web and assembling sheath-core type conjugate fiber, by the web It compresses and heats in thickness direction, be softened or melted the sheath ingredient, merge the sheath-core type conjugate fiber each other, be shaped to Tabular, so that the fiberboard that manufacture is 300MPa or more by the initial bending elasticity modulus that three point bending test obtains, described The core component of sheath-core type conjugate fiber is formed by copolymer by ethylene glycol and terephthalic acid (TPA) and constitutes, sheath ingredient by ethylene glycol, Adipic acid, terephthalic acid (TPA), M-phthalic acid and/or diethylene glycol are formed by copolymer composition.

2. the manufacturing method of fiberboard according to claim 1, wherein pre-heated web is held on room temperature Metal making sheet, compressed in thickness direction.

3. the manufacturing method of fiberboard according to claim 1, wherein the web of room temperature is held on to the gold heated Belong to making sheet, is compressed in thickness direction.

4. the manufacturing method of fiberboard according to claim 1, wherein carry out needle thorn to web, keep core-sheath-type compound After fiber carries out three-dimensional intertexture each other, compresses and heat in thickness direction.

5. the manufacturing method of fiberboard according to claim 1, wherein fiberboard is obtained most by three point bending test Macrobending intensity is 7.3MPa or more.

6. the manufacturing method of fiberboard according to claim 1, wherein sheath-core type conjugate fiber is that core-sheath-type is compound long fine Dimension or core-sheath-type composite short fiber.

Technical field

The present invention relates to a kind of manufacturing methods of the fiberboard of excellent rigidity, even if in particular to one kind is not to manufacturing condition The manufacturing method of fiberboard of high rigidity and high bending strength can also be obtained by carrying out strict control.

Background technique

In the past, it is known to use core component is formed by by high-melting-point polymer and low melting point polymer is formed by sheath ingredient Sheath components fuse only merges sheath-core type conjugate fiber each other by the sheath-core type conjugate fiber of composition, manufactures high stiffness Fiberboard (patent document 1).Following method is disclosed in the embodiment of patent document 1: using using poly terephthalic acid Glycol ester is put into melting extrusion dress as core component, the sheath-core type conjugate fiber using polyethylene as sheath ingredient It postpones, from mouth mold (mouth gold) discharge, manufactures flat fiberboard.

Summary of the invention

The present invention is the improvement to the invention recorded in patent document 1, and it is an object of the present invention to provide a kind of by using specific Polymer can be obtained as core component and sheath ingredient with the time that is heated and pressurizeed of the heating temperature of wider range and wider range To the manufacturing method of high rigidity and the fiberboard of high bending strength.

That is, to form web by assembling sheath-core type conjugate fiber the present invention relates to a kind of manufacturing method of fiberboard Afterwards, which is compressed and is heated in thickness direction, be softened or melted the sheath ingredient and make the sheath-core type conjugate fiber phase Merged between mutually, be shaped to tabular, thus the initial bending elasticity modulus that manufacture is obtained by three point bending test be 300MPa with On fiberboard, the core component of the sheath-core type conjugate fiber is formed by copolymer by ethylene glycol and terephthalic acid (TPA) and constitutes, Sheath ingredient is formed by copolymer by ethylene glycol, adipic acid, terephthalic acid (TPA), M-phthalic acid and/or diethylene glycol and constitutes.

In the present invention, obtained first using specific sheath-core type conjugate fiber as the web for constituting fiber.Here, specific Core-sheath-type it is compound refer to core component be made of the copolymer of ethylene glycol and terephthalic acid (TPA), sheath ingredient by ethylene glycol, adipic acid, Terephthalic acid (TPA), M-phthalic acid and/or diethylene glycol are formed by copolymer composition.The copolymer for constituting core component is by second Glycol as diol component, using terephthalic acid (TPA) as dicarboxylic acid component carry out dehydrating condensation obtained from polyester.It should be noted that As dicarboxylic acid component, other dicarboxylic acid components such as extremely a small amount of M-phthalic acid can be mixed with.Constitute being total to for core component The fusing point of polymers is about 260 DEG C, and glass transition temperature is about 70~80 DEG C.Constitute sheath ingredient copolymer be by ethylene glycol and Diethylene glycol as needed as diol component, using adipic acid, terephthalic acid (TPA) and M-phthalic acid as needed as Dicarboxylic acid component carries out copolyester obtained from dehydrating condensation.It should be noted that diethylene glycol and M-phthalic acid need using At least either is, it is preferable to use the two.The purpose for mixing diethylene glycol and/or M-phthalic acid is the fiber phase in order to enable arriving Amalgamation between mutually improves.When mixing diethylene glycol in diol component, generally ethylene glycol: diethylene glycol=10:0.05~ 0.5 (molar ratio) left and right.Be arbitrary as the adipic acid of dicarboxylic acid component and the mixed proportion of terephthalic acid (TPA), but for oneself two Acid: terephthalic acid (TPA)=1:1~10 (molar ratio) left and right.In addition, when mixing M-phthalic acid in dicarboxylic acid component, generally M-phthalic acid: adipic acid: terephthalic acid (TPA)=0.04~0.6:1:1~10 (molar ratio) left and right.Constitute the copolymerization of sheath ingredient The fusing point and glass transition temperature of object are arbitrary, but consider the mutual amalgamation of sheath ingredient, compressibility of web etc., Fusing point is preferably about 200 DEG C, and glass transition temperature is preferably about 40~50 DEG C.

The weight ratio of core component and sheath ingredient is core component: sheath ingredient=0.3~5:1 (weight ratio) left and right.If core The weight ratio of ingredient is too low, then there is the trend of fiberboard rigidly reduced.In addition, if the weight ratio mistake of core component Height, then sheath ingredient becomes difficult to merge each other when heated, is easy to fluff on surface.Core component and sheath ingredient both can be same Heart configuration, can also prejudicially be configured.However, it is easy to happen contraction when heated if prejudicially configured, Therefore it preferably concentrically configures.

Sheath-core type conjugate fiber can be total to by the low melting point by the high melting point polyester of core component is used as and as sheath ingredient Polyester is supplied to the device for spinning with Compound spinning wire hole and carries out well known method as melt spinning and obtain.Core-sheath-type Composite fibre can be core-sheath-type composite long fiber, or core-sheath-type composite short fiber, but it is compound long fine using core-sheath-type Dimension can obtain the high fiberboard of rigidity.Web is obtained in order to use core-sheath-type composite long fiber, generally using so-called Spun-bond process.I.e., it is possible to which the core-sheath-type composite long fiber obtained by melt spinning is assembled slabbing at once obtains web. In addition, core-sheath-type composite short fiber can be made to carry out by carding machine in order to use core-sheath-type composite short fiber to obtain web Fibrillation, and assemble slabbing.The weight of web is at least 150g/m²More than, preferably 300g/m²More than.If web Weight is too low, then thickness is thinning, and the rigidity of fiberboard reduces.In addition, the weight of web does not have the upper limit, generally 2000g/m² Left and right, if it exceeds the value, then can become not easy to handle.

Obtained web directly can be compressed and be heated in thickness direction, sheath-core type conjugate fiber can also be kept mutual Between temporarily be bonded after, compress and heat in thickness direction.Alternatively, it is also possible to compress and add in thickness direction after carrying out needle thorn Heat.When carrying out needle thorn, needle thorn can be carried out with the state that sheath-core type conjugate fiber is not bonded temporarily each other, it can also be with temporary The state of bonding carries out needle thorn.If it is the former method, since fiber is not bonded temporarily each other, when carrying out needle thorn The damage to fiber it is few, be not easy to cause rigid reduction because of broken yarn etc., thus preferably.In addition, if it is the method for the latter, It for the web for the state that fiber is temporarily bonded each other, therefore is easily handled, is easy conveying.Needle thorn according to known methods into Row makes sheath-core type conjugate fiber carry out three-dimensional intertexture each other as a result, obtains what sheath-core type conjugate fiber was arranged in thickness direction Fine and close non-woven fabrics.It should be noted that even if the temporary bonding also can be because of needle when sheath-core type conjugate fiber is temporarily bonded each other It pierces and is destroyed, sheath-core type conjugate fiber is made to carry out three-dimensional intertexture each other.Needling density is 10 thorn~200 thorns/cm²Left and right.

Web can be used into known any means in the method that thickness direction compresses and heats.It can be representative Enumerate two methods below in ground.That is, by pre-heated web be held on the metal making sheet of room temperature thickness direction into The method and the web of room temperature is held on to the metal making sheet heated in the side that thickness direction compresses that row compresses Method.For heating condition and the pressurized conditions compressed in thickness direction, as long as the sheath ingredient with sheath-core type conjugate fiber is soft The condition progress changed or melted, merge sheath-core type conjugate fiber each other.Specifically, heating temperature be 100 DEG C~ 200 DEG C or so, pressurized conditions are calculated as 1~500kg/cm with face pressure²Left and right.In addition, being heated and pressurizeed the time is 10~150 seconds left sides It is right.Under the above conditions, it is compressed and is heated in thickness direction, be softened or melted sheath ingredient, make sheath-core type conjugate fiber It merges each other and is shaped to tabular.Then, it carries out cooling by letting cool etc. and obtains fiberboard.It should be noted that this flat Plate can be it is whole it is endless be all plate, be also possible to substantially plate and the bending of other positions or bending.

It is that fiber is made by the fusion of the sheath ingredient of sheath-core type conjugate fiber by the fiberboard that method of the invention obtains Made of being securely engaged each other.When sheath ingredient sufficiently melts, become using sheath ingredient as parent and wherein in the presence of reservation fiber The fiberboard of the state of the core component of form.In addition, sheath ingredient only soften or a part melting in the case where, become sheath ingredient Not parent and sheath-core type conjugate fiber each other exist permitted lacunose state fiberboard.Under any state, You Benfa The initial bending elasticity modulus of the fiberboard that bright method obtains obtained by three point bending test is all 300MPa or more, all for High rigidity.It should be noted that initial bending elasticity modulus is first based on the strain in three point bending test-bending load curve Beginning slope and calculate.

The fiberboard obtained by method of the invention can be preferred for various uses.For example, can as sound-absorbing material, Interior fitting components etc. use, and in addition can also use as the substitute of previous plastic plate.

Method of the invention due to using sheath ingredient of the specific polyester copolymer as sheath-core type conjugate fiber, with The heating temperature of wider range and the pressurization of wider range and heating time can also obtain the fiberboard of high rigidity.Therefore, it rises Even if can also obtain the fiber of high rigidity and high bending strength to strict control or setting is not carried out to the condition that is heated and pressurizeed The effect of plate.

Specific embodiment