close

Вход

Забыли?

вход по аккаунту

?

JPS56149000

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS56149000
Specification 1. Title of invention
シ−ト
3, 'Detailed Description of the Invention The present invention relates to a sheet. More
specifically, mechanical properties and electrical properties obtained by mixing papermaking
good pulpy particles mainly composed of ethylene terephthalate / ethylene inphthalate
copolymer, wood pulp and short # 18 in specific proportions , Thermal property I, water
resistant sheet, etc., ° C, electric insulating paper packaging material, interior materials of
interior and car, sanitary paper, heat insulating material, maps, securities paper, Scaker corn
paper, etc. It is a sheet useful for industrial and consumer applications. Conventionally, wood
pulp is most widely known as pulp-like particles used for paper. For example, a boat made of
wood pulp is often used as an electrical insulating paper. However, paper from wood pulp has a
thermal power that the sheet has a low breakdown voltage. In addition, there is a large defect
such as a lack of heat resistance, which is far from the heat resistance required for reducing the
size and weight of electric devices such as motors and transformers. Recently, as pulp-like
particles obtained from synthetic polymers are excellent in heat resistance, electrical insulation
and the like, EndPage: 1 has been proposed as a material for electrically insulating paper, and
many proposals have been made. . Also, at present, as a solution to the above-mentioned poor
heat resistance of wood pulp paper, a paper excellent in heat resistance under the trademark
NOMEX is commercially available from Teyubon Inc. of the United States of America, but this
paper also has the following disadvantages. ing. That is, although hygroscopicity is small
compared to wood pulp paper, it is still difficult, is very expensive, and is useable for heat
resistance yHi and Re, and it is poor in oil immersion property. As a solution to these drawbacks,
we have previously proposed a method for producing poly (fluorene terephthalate) pulp-like
11-05-2019
1
substances, as confirmed by JP-A-54-55622. That is, in a pulp-like substance production method
in which a poly (l-qu-xylene terephthalate solution) is introduced into a precipitating agent and
carried out in a thousand steps; The solvent or an aqueous solution thereof selected from the
group consisting of ketone solvents, and introduced into a precipitating agent in which the
concentration of alcohol and / or ketone solvents in # solvent or its aqueous solution is 40 to
10031 i% And a process for producing a valve-like material, characterized in that the poly (polybutylethylene terephthalate) is precipitated as fine particles. Pulp-like substances produced by
the method described in the above-mentioned patent are preferable because the raw materials
are relatively inexpensive to obtain, for example, polyethylene terephthalate. As a solvent, it is
necessary to use a troublesome phenol type solvent for handling the soot, or to use an alcohol
type, a keto type, a gun type, etc. low risk flash point solvent as a precipitating agent. There is a
disadvantage in that special measures are required in terms of manufacturing costs and
manufacturing equipment costs are high.
On the other hand, in JP-B-38-13912, Example 12 is obtained by adding a 74/26 modified
turylene 7 thallate / ethylene isophthalate copolymer to N, N-dimethylformamide 7mid to
prepare a 10% solution and introducing it into water. The method of producing a sheet from the
above-described fibrid and poly (ethylene terephthalate) fiber is described. Since water is used as
the j ′ ′ precipitating agent, the resulting fine lid is mostly coarse with little fibrillation, and the
sheet obtained by making a paper using this is also poor in mechanical strength and mechanical
properties. It can not be called light. Since the pulp-like particles of polyethylene terephthalate
and ethylene terephthalate / ethylene isophthalate copolymer are hydrophobic, when making
paper using this, it is easy to produce so-called float and it is difficult to obtain a sheet with a
good formation. It also has disadvantages. In addition, wood pulp paper has the disadvantage of
not being heat-sealable (・ ・, low water resistance, etc.), and thermoplastic synthetic fiber or
some kind of synthetic to solve the disadvantages of A method of mixing and making pulp and
wood pulp has been proposed. For example, pp. 4 to 10 of the Synthetic Paper Research Report
reported on polypropylene fiber and wood pulp mixed paper, and it is described that water
resistance and heat sealability are improved. It is an undesirable result that the breaking length
of the paper is greatly reduced by the mixed paper making the application range limited. In order
to compensate for the decrease in cutting length due to polypropylene fiber mixing, mixed paper
making of polyvinyl alcohol-based binders is also being studied at the same time. Although the
use of a polyvinyl alcohol binder improves the breaking length, it is still insufficient. The
inventors of the present invention have solved the drawbacks of the prior art and have made
intensive studies to obtain a sheet having low cost and excellent properties. As a result, a solution
obtained by dissolving ethylene terephthalate / ethylene isophthalate copolymer integrated in 7mid solvent Is introduced into a precipitating agent having an amide solvent and water and the
concentration of the amide solvent is within a specific range with stirring. From K, fibrillation is
sufficient and pulp-like particles with good papermaking properties are obtained. A sheet
prepared using this pulp-like particle and wood pulp has good papermaking properties and
11-05-2019
2
mechanical properties, and it is found that the EndPage: 2 is also excellent in other turbid lands,
and the present invention is maintained. is there. That is, the present invention is made by mixing
paper with valve-like particles of ethylene terephthalate / ethylene isophthalate copolymer, 2 to
95% by weight of pulp, 2 to 95% by weight of pulp and 0 to 95% of fiber. It is a sheet.
Wood pulp The wood valve used in the present invention is a pulp manufactured using softwood,
hardwood, hemp, linseed, linters, straw, bamboo, waste paper etc. as mechanical pulp, chemical
valve, chemical valve, ground pulp, chemiground It can be freely selected according to the
applications of pulp, sulfuric acid valve, sorter pulp, Ml salt rope, semi-chemical pulp, brush pulp,
virgin raci valp, cas pulp leash and sheet. Two or more wood valves can be used at the same time.
The ethylene terephthalate / ethylene isophthalate copolymer referred to in the present
invention means ethylene glycol as the glycol component and terephthalic acid and in 7 tal acid
as the acid component; or derivatives of terephthalic acid and ink tal acid such as methyl
terephthalate, inphthalic acid It is obtained by condensation polymerization of methyl acid and
the like by a known method as agent I. The ratio of ethylene terephthalate / ethylene
isophthalate in the copolymer can be selected in the range of 90/10 to so / so (mole unit)
depending on the use of the sheet, but it can be dissolved in solvents. In view of easiness of
copolymer production, heat resistance, etc., 80/20 to 60/40 (molar ratio) is particularly
preferable. When the ethylene isophthalate component is less than 9010 (molar ratio) of 1111
compound, it dissolves in 7-mid solvent, and conversely, it softens voice when ethylene in 7talate fraction is larger than 50/60 (molar ratio) Is not preferable because the thermal image
becomes worse such as The degree of polymerization of ethylene terephthalate / ethylene
inphthalate copolymer may be better than the degree of polymerization required when producing
稙-, but the molecular weight is approximately 4.000 or more, preferably 10.000 or more. Is
good. Depending on the heart wall, the ethylene terephthalate / ethylene isophthalate copolymer
may contain an additive such as a heat stabilizer, f # I agent, a light stabilizer, etc. or it may be
mixed with another one. No problem. 7-Mid Solvents The 7-mid solvents mentioned in this
document include N-methyl-2-pyrrolidone, N, N-dimethyl acetoamide, NN-dimethyl water,
lumamide, N-7 cetyl-piridone, N-methyl -Kab p-lactam, N-7 cetyl-cabrolactam. It is a general term
for solvents of hexamethylphosphoramide and tetramethylurea 11F, but in the present invention,
a solvent mainly composed of N-methyl-2-pyrrolidone has good solvency and good solution
stability, etc. Is preferably used because of the power of Also, these 7-mid solvents can be used
alone or in combination with other solvents, and further, non-solvents such as water, or poor
solvents can be added and mixed within a reasonable range. Can also be used.
At the time of preparation, a solution of ethylene terephthalate / ethylene isophthalate covalence
substance dissolved in a 7-mid solvent is introduced into a precipitant consisting of water and an
amide solvent to precipitate as fine particles pulp-like particles. Apply the method An ethylene
terephthalate / ethylene isophthalate copolymer is dissolved in an amide solvent, dissolved in an
11-05-2019
3
aqueous solution of ethylene terephthalate / ethylene iso 7 crate copolymer at one time, and the
degree of polymerization of the copolymer, the copolymerization ratio, The amount varies
depending on the type S of the precipitator used for producing the / </ L-shaped particles, but
generally 5 to 30% by weight, preferably 7 to 2 slt, particularly preferably 昏 iEndPage: 3 to 0 to
20 weight 10%. When [i or less than 5% by weight of ethylene terephthalate / ethylene
inphthalate copolymer in solution is less than 5% by weight, the size of the obtained pulp-like
particles becomes extremely small, and at the time of paper introduction, @ There are many
wrinkles and it is not preferable. Conversely, if the concentration of the copolymer in the solution
is greater than 5%, the shape of the pulp-like particles obtained is coarse and less fibrillated, and
the entanglement of pulp-like particles パ ル プ, pulping! As the entanglement between the child
and the short lII feed decreases, the papermaking property becomes worse (as well as the
machine property of the obtained sheet 5r # + becomes worse. For the preparation of the
solution, for example, tanks provided with a stirring blade and a heating device can be used as an
apparatus, but it is better to charge a solvent first and to charge a copolymer in powder form for
Beret F form while adding to 171. It is easy to dissolve. When the copolymer is charged first, and
then the solvent is charged, the amount of co-solidification (B) is longer than K which is attached
and dissolved. The temperature of the solvent when the copolymer is put in the solvent varies
depending on the copolymerization ratio of the copolymer, for example, the ratio cuff 0730
(mole of ethylene terephthalate / ethylene phthalate). About 70 ° C. or less is preferred for the J
+) copolymer. When the copolymer is charged in a solvent having a salinity higher than about 70
° C., it is not preferable that the copolymers become welded or stagnate and take a long time to
dissolve. After the copolymer is uniformly dispersed in a solvent, the temperature is raised and
dissolved in poor food. The melting temperature is 5. Depending on the type of solvent, the
copolymerization ratio of the copolymer, etc., for example, a copolymer having a ratio of 70/30
(molar ratio) of ethylene terephthalate / ethylene iso7 phthalate is N-methyl-2-pyrrolidone or N
When dissolved in N, -dimethyl 7 set 7j, heating up to about 110 to 120 ° C is sufficient, and
the copolymer having the copolymerization ratio of B5 / 15 (molar ratio) is N- When dissolved in
methyl-2-pyrrolidone, it may be raised to about 130 to 140 ° C.
The solution in which the copolymer is dissolved varies depending on the type of solvent used,
the copolymerization ratio of the copolymer, and the like, but can be subjected to precipitation at
a temperature of 10 to 130 ° C, preferably 20 to 100 ° C. Although it is not always necessary
to add and mix solid inorganic substances which do not substantially react with the solution and
do not dissolve in the solution in the additive solution, it is not necessary to impregnate, heat
resistant, electrically, electrically insulating, papermaking. It is desirable to further improve the
quality. In this case, micas, asbestos, glass flakes, quartz powder, talc, kaolin, alumina, potassium
titanate and the like can be used as the solid inorganic substance. When mixing a solid inorganic
substance, 5-400 weight of a polymer is good. In addition, antioxidants, ultraviolet light
absorbers, pigments, and organic powders such as wood flour and polyethylene terephthalate
powder may be added. It is also possible to mix solutions of other polymers, optionally long.
11-05-2019
4
Precipitating agent In the present invention, in the production of pulp-like particles, a precipitant
comprising a water and a 7-mid solvent and having a strength of 20-85% by weight of the 7-mid
solvent is used as a precipitant. The optimum conditions for the concentration of the 7 well
solvent in the precipitant vary depending on the copolymerization ratio of ethylene terephthalate
/ ethylene iso7 thallate copolymer, the degree of polymerization, the temperature of the
precipitant, the type of precipitation equipment, etc. When one of the amide-based solvents is
thicker than 85%, the resulting pulp-like particles aggregate and weld together.-Model
characteristics of the sheet obtained by processing the pulp-like particles,) This leads to a
decrease in sexiness and the like, and also makes the papermaking property worse. When the
concentration of the amide solvent in the precipitating agent is smaller than 207 T, the shape of
the pulp-like particles obtained is rod-like and coarse, and the valve-like particles become
entangled with each other, the pulp-like particles and the cocoon # The mechanical properties of
the sheet obtained as the binding property to the fiber decreases and the papermaking property
worsens, and the temperature of the precipitating agent which is too negative to have negative
relativism, also has excellent papermaking property and good shape. It is one of the overlapping
factors for obtaining the pulp-like particles of the present invention, and is 70 "C or less,
preferably 50" C or less. The precipitant is fast stirred, not desolvated from the introduced
solution! When K, it is preferred to operate to produce shear or beating. The flow ratio of the
precipitant / solution is preferably 5/1 to 200/1, particularly preferably 1o / 1 to 100/1.
(Weight 、) 3 tatami 1 In the present invention, the ratio of ethylene terephthalate / ethylene ink
tare) if coalesced no-harp-like particles / wood pulp / wedge / short edge fiber is sheet usage and
electrical conductivity, air permeability, machine According to the required properties such as
thermal properties and heat resistance?
In the case of mixed papermaking that can be cut, but the short fiber length, the amount of short
fiber needs to be 95 weight or less with respect to the whole sheet, and the amount of short fiber
for the entire sheet busy is 1/95 weight i) In other words, the strength of the wet web becomes
weak, making papermaking difficult, and the mechanical properties and the like of the obtained
sheet also become insufficient. The ratio of pulp-like particles of copolymer to wood pulp in the
sheet can be freely selected according to the application and purpose. For example, in order to
reduce the hygroscopicity of the sheet or to improve the water resistance and heat sealability, it
is more preferable to increase the ratio of the pulp-like particles of the copolymer. In addition, it
is preferable to increase the ratio of wood pulp when it is desired to reduce the price of the sheet
or in the case where water resistance, heat sealability, and hygroscopicity do not matter so much.
Papermaking from pulp-like particles / wood pulp / short fibers of ethylene terephthalate /
ethylene inphthalate copolymer is carried out similarly to the case of making paper from
conventional wood pulp with a long mesh type or circular mesh type paper machine. It is good to
make paper by a wet method. At this time, if necessary, a surfactant, a dispersing agent such as
root juice of Toro-roai, and a thickener may be added. In the present invention, the single yarn
stiffness of the short fibers used in forming the sheet varies depending on the application, but is
11-05-2019
5
0.1 to 30 denier, preferably 085 to 10 denier. The length of the short fibers is 1 to 30 a + w,
preferably 2 to 15 and particularly preferably 3 to 10%. As such short orange fibers, although
rare ones may be applicable depending on the use of the sheet, for example, the following may
be mentioned. 1 Polypropylene Pyrene Fiber 2 Polyethylene Fiber λ Polytetrafluoroethylene
Table Fiber Table Polycarbonate Fiber 1 Poly (λ 6-diphenyl-para-phenylene oxide) Fiber
(polyamide fiber (including aromatic polyamide fiber) 7 Polyester -Based fiber (including
aromatic polyester-based fiber) & polyacrylonitrile-based fiber 9, polyvinyli / L, alcohol-based
fiber 10, aromatic poly 7-midimido # fiber 11, aromatic polyimide-based fiber 12 polyvinyl
chloride-based fiber 13 glass fiber, mineral 9 stone F =, metal lk fiber, potassium potassium l @ 3
g, cz rack, kaolin la fine, silica string, flumina cotton fiber, silica alumina !! l !! Etc. Mineral fiber
14 such as cellulose M synthetic fiber m (bifucose rayon, cupra etc) 15, cellulose semi-synthetic
# # (acetate, triacetate etc) 16 protein-based regeneration line drawing these short fibers and
wood pulp The introduction of the copolymer with the pulp-like particles can be optionally
selected according to the application.
For example, polypropylene fiber with good dielectric properties, polyethylene fiber, vorite,
trafluorop ethylene-based N & fiber, polycarbonate-based * feed, poly (46-silane-para-phenylene
oxide) pt, H # etc. in% It is desirable as a short EndPage: 5 # starting point in manufacturing a
complete set for pre-feed 'IT, kezle. In addition, aromatic polyamide fiber, aromatic
polyamideimide fine fiber, aromatic polyimide fiber, aromatic polyester fiber, Holi (λ6thiophenyl-para-phenylene oxide +) lime is a sheet that is required to be # 1 thermal. It is useful
in manufacturing. Furthermore, glass fibers, mineral wool, asbestos, kaolin brass rock wool and
the like are useful in producing sheets for applications requiring heat resistance and flame
retardant thermal insulation. In the present invention, papermaking KIP is necessary. Depending
on the properties, it is also possible to make paper by combining inorganic polymers such as
pulpy substances of other polymers, aorum, kaolin, talc, and 7-flakes clay. The sheet obtained as
described above can also be used as it is after drying, but imparting a performance superior to K
by heating under pressure by means of hot pressing or hot pressing. Can. The temperature at
which the pressure is applied varies depending on the copolymerization ratio of ethylene
terephthalate / ethylene iso7 thallate copolymer, 5IlfI of short fibers, and the specific volume of
wood pulp in the sheet, but a suitable temperature is room temperature to 29 G ° C. The
pressure differs depending on the temperature and the like, such as the pre-alignment ratio, the
short fiber s class, the amount of pulp-like particles in the sheet, the application of the sheet, etc.,
but the pressure is preferably 400 Kp / cm or less. The present invention will be described in
detail by the following examples. Example 1 Preparation of Copolymer Solution N-methyl methyl
methacrylate wherein 16 parts by weight of ethylene terephthalate / ethylene e-softato
copolymer ratio wheel, 70/3 G (molar ratio) copolymer was adjusted to 30 ° C. After being
charged into -2-pyrrolide / 84 parts by weight with stirring, the copolymer was dissolved in a
fund by heating to 120 ° C. at a temperature rising rate of about 0 ° C./min. The solution was
then cooled to a temperature of 30 ° CK to give a solution for pulpy particle production. 50
11-05-2019
6
parts of N-methyl-2-pyrrolidone and 50 parts of water II were mixed to obtain a precipitant. バッ
フルのついているステーターとタービンj! A pipe-type continuous settling machine consisting
of a combination of a type rotor (wing length 40 u) and having a settling agent, a supply port for
solution, and a sink for the slurry of his pulp-like particles. The copolymer slurry was supplied
simultaneously at a flow rate of the copolymer solution 97351 / Hr and the precipitant 900 J /
Hr, and a valve-like particle slurry was taken out from the outlet.
At this time, the temperature of the precipitant was adjusted to 10 ° C., and the temperature of
the copolymer solution was adjusted to 30 ° C. The rotation V of the null-ter was 9.600 r, p, m. .
The resulting pulp-like particles' 7 and laryas were put into a netsuke-type reduced pressure fm
K using 200 mesh of stainless steel gold 1 mft F, and most of the precipitant was separated as
liquid F. Next, 6Cj of pulp-like particles (solid content) and twice the amount of ion-exchanged
water are supplied in two divided portions without removing the cloud-like particles from the F
main frame, and the ethylene terephthalate is washed. Pulp-like particles of / ethylene iso7-talate
copolymer were obtained. Wood pulp NBK'P was beaten for 120 minutes at a concentration of 2
in a 2 n volume test Nyagala Beater (made by Toyo Seiki Seisakusho). Papermaking / (rup-like
particles and wood) of ethylene terephthalate / ethylene isophthalate copolymer obtained by the
above (rupe and fineness O, S denier of fiber), fiber length 5! Water dispersion power sheet
containing 1% polyethylene terephthalate fiber layer% paper sheet, and then made into a paper
sheet and dried at 70 ° C for 3 hours 2 hours under conditions of 1.20 ° C 2ooKp / m 2
Pressed for a minute to obtain a paper with an earthquake volume of 110 g 711 '. The results are
shown in Table 1 (Examples 1-3. The results are shown in Comparative Examples 4 to 7).
EndPage: 6 In Table 1, positive 1 to 3 are sheets of the present invention, and positive 4 to 7 are
comparative examples. The floor 4 is a sheet made only of wood pulp, and although the strength
and elongation are good, the breakdown voltage is insufficient. Nn5, 6 is a sheet made of wood
pulp and polyethylene terephthalate fiber, and while 1 of the polyethylene terephthalate fiber is
increased, the strength, elongation and dielectric breakdown voltage are greatly reduced, which
is not preferable. NQ7 is a sheet consisting of 90% by weight of pulp-like particles of ethylene
terephthalate / ethylene isophthalate copolymer and 10% by weight of polyethylene
terephthalate fiber, and has good dielectric breakdown voltage and elongation but low tensile
strength. Also, the appearance was film-like and undesirable. On the other hand, floors 1 to 3
were all excellent in strength and elongation, dielectric breakdown voltage and appearance of the
sheet. Comparative Examples 8 to 11 In Example 1, floor 3, the concentration of N-methyl-2pyrrolidone in the precipitating agent during preparation of the pulp-like particles of ethylene
terephthalate / ethylene isophthalate copolymer was adjusted to the positive 8 of Table 2 below.
Except for the concentration shown in .about.Nb11, other conditions were completely the same
as IEK to produce pulp-like particles and sheets.
The measurement results for these are shown in Table 2. In Table 2, Table 2 Nn 8, 9 is an
11-05-2019
7
example of the case where the concentration of N-methyl-2-bipridone in the precipitating agent
is smaller than the range of the present invention, and any of the obtained pulpy particles The
shape was coarse. Further, the surface of the obtained sheet was extremely uneven and the
tensile strength and the dielectric breakdown voltage were also low. Also, NCLIO, 11 is the case
where the concentration of N-methyl-2-pyrroline in the precipitant is too high, among which
positive 10 is that the pulp-like particles are cohesively welded and the sheet performance is
poor. The The positive 11 was a case where the concentration was even higher than that of PL &
1to, and almost no precipitation occurred, and pulpy particles could not be obtained. EXAMPLE 4
Pulp-like particles o, st (solid content) of the same ethylene terephthalate / ethylene isophthalate
copolymer as used in Example 1 and wood pulp (same as used in Example 1) α 21 (solid
content) Using a taraply standard sheet machine from an aqueous dispersion containing a single
fiber fineness of 2 d, a boli-propylene short fiber with a fiber length of 6 (Mitsubishi Rayon, trade
name: Pyrene) 1.2 # When papermaking was carried out, EndPage: 7 papermaking property
obtained a sheet having a good texture and good furnace properties. After drying, the sheet was
pressed in the first stage under the conditions of 80 ° C. and 3 oo Kp / −, and then hot pressed
under the conditions of 160 ° C. O and 9/7. The obtained paper had a tensile strength of 5, OK
fl / gj, an elevation angle of 14%, a dielectric constant measured at 20 ° C. according to the
method of JISe-2111, and a dielectric loss tangent of 19, 0.1%, respectively. For comparison, a
sheet was similarly prepared from pulp-like particles 089 (solid content) of ethylene
terephthalate / ethylene isophthalate copolymer and the polypropylene fiber 1.29 without using
wood pulp and K. Although mechanical properties etc. were good, it was not preferable that
shrinkage of the sheet was observed at the time of heat pressing, and that the obtained sheet was
somewhat filmy. Example 5 1 g of the pulp-like particles of the same copolymer as in Example 1
(solid content> i wood pulp xf (solid content) and kaolin MM (Inlight-Bugcock Refractory Co., Ltd
.; trade name: Kao wool) 28 t was placed in 2 g of water in a household mixer and vigorously
stirred for about 5 minutes. Then, after making a paper sheet using a tarabie standard sheet
machine, it was dried at -105 ° C. to obtain a sheet having a thickness of about 8 sheets. When
this sheet was used as a burner flame, almost no arcing in size was observed and the flame
resistance was good.
Further, the thermal conductivity at 50 ° C. was as small as 0.03 Kcal / I- · br ° C., for example,
a preferable value as a heat insulating material. Example 6 Example 2 except using 15 denier,
511 n-length polymetaphenylene inphthalamide # fiber (trade name-Ninexus 0, manufactured by
Teijin Limited) in place of polyethylene terephthalate fiber. Conducted in the same manner as the
above to obtain a sheet. The performance was as follows. Tensile strength: & 8 strain /Elongation: 60 Moisture-binding p-strength: 8.6 Kp 7 mj r: For good comparison, a sheet
prepared using nop (could-like particles) of copolymer instead of wood pulp Although the tensile
strength and elongation and the wet setting strength were good, the film became like and the
external-was not preferable. Furthermore, for comparison, a sheet prepared using wood pulp
instead of copolymer / (rup-like particles) had a good tensile strength of 7.0 Kg /-or a low wet
11-05-2019
8
strength of 1.5 Kp / d. , Was poor in water resistance. EXAMPLE 7 Pulp-like particles are
prepared in the same manner as in Example 1 except that a copolymer having an ethylene
terephthalate / ethylene inphthalate copolymer ratio of $ 85/15 (molar ratio) is used and the
following force is formed into a tube. Obtained. The copolymer concentration in the solution was
10% by weight. 2) The temperature was raised to 140 ° C. in preparation of the solution. 3) The
rotational speed of the p-ter of the precipitator was 5.10 Or, p, m. The performance of the sheet
subjected to paper making and heat pressing in the same manner as in Example 1 using the pulplike particles was as follows. Tensile strength 9.7 Kg / d Elongation 63 Concerned wet strength
9.5 Kg / mj Example 8 In the same manner as in Example 1 except that the following points are
formed into a tube, pulpy particles of copolymer are obtained. made. 1) Using N, Ndimethylacetamide instead of N-methyl-2-virridone as a solvent in dissolving the copolymer 2)
KN instead of N-methyl-2-pillydon in the precipitating agent KN, N-dimethyl 7 cetoamide was
used to bring the concentration of N, N-dimethylacetamide to 70% by weight. EndPage: 83) The
temperature of the solution to be precipitated was 70 ° C. As in Example 2, using the obtained
pulp-like particles, El! I got a sheet. The performance of this sheet was almost the same as
Example 2 and good. Procedure correction January 29, 1955 Show of the Patent Office Secretary
1 case display Japanese Patent Application No. 55-5! 1B! No. 1 2, title of the invention 2, title
sheet of the invention 3 Person who makes corrections Related patent applicant
シ−ト
Osaka City Higashi-ku Minamihoncho 1-chome 11 (300) Teijin Limited Representative Tetsusu
Tomoo 1j 111! Detailed description of the invention, column 6, more than the content of
correction EndPage: 9
11-05-2019
9
Документ
Категория
Без категории
Просмотров
0
Размер файла
25 Кб
Теги
jps56149000
1/--страниц
Пожаловаться на содержимое документа