JPH01111097A - Stretching proceessed paper - Google Patents

Abstract

PURPOSE: To obtain a stretching processed paper capable of simply changing air permeability and twisting to stretched part and useful for filter, etc., by blending a stretching fiber with a short fiber and subjecting the resultant paper to tensile processing, etc., to stretch the stretching fiber. CONSTITUTION: This processed paper is obtained by blending (A) a stretching fiber 2 with (B) a short fiber 3 and subjecting at least part of the resultant paper to tensile processing or press working, etc., to stretch the component A. Furthermore, the component A is a thermoplastic synthetic fiber and is preferably coated or impregnated with an agent such as a dyeing agent, a releasing agent or a binder before or after stretching.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a stretched paper that can be used as a filter, a breathable tape, a wrapping paper, a decorative paper or a twisted yarn.

(Prior art and problems) Conventionally, filters have been proposed that take advantage of the air permeability and water permeability of paper. In order to achieve the specified value of air permeability, the type of raw materials, composition, disintegration,
It is necessary to adjust the chemicals, the thickness of the paper, and the pressure applied by each roll of the paper machine, etc. - In order to change the roughness and air permeability of the paper after it has been made, There was a problem in that the only option was to take time-consuming measures such as drilling holes.

In addition, when conventional paper is cut into tape shapes and used as threads for twisting, only a monotonous product can be produced; however, by combining and twisting multiple threads, it is possible to create a unique appearance. I was allowed to have it. Therefore, conventional twisted yarns have not been used for decorative purposes, and their uses have been mainly limited to knitting, textiles, and the like.

An object of the present invention is to provide stretch-processed paper whose air permeability and water permeability can be easily changed when used as a filter by changing the degree of stretch of stretchable fibers through tension processing, press processing, etc. It is in. Furthermore, the present invention provides stretch-processed paper that, when twisted to be used as twisted yarn, can yield twisted yarn with the characteristic that the twist is applied mainly in the portion where the extensible fibers are stretched by tension processing, press processing, etc. There is a particular thing.

Another object of the present invention is to provide stretched paper that can be dyed with a delicate hue. Another object of the present invention is to provide stretch paper that can be provided with various properties depending on the drug.

Structure of the Invention (Means for Solving the Problems) The present invention has been made to solve the problems described above, and the first invention is based on the method of elongation [mixing raw fibers and short fibers,
The gist thereof is that the extensible fibers are elongated by subjecting at least a portion thereof to tension processing, press processing, or the like. Further, the gist of the second invention is that extensible fibers and short fibers are mixed, and at least a part of the mixture is subjected to tension processing or press processing, and dyed before or after stretching the extensible fibers. It is something. moreover,
The gist of the third invention is that extensible fibers and short fibers are mixed, and at least a part of the mixture is subjected to tension processing or press processing, and a chemical is applied or impregnated with the extensible fibers before or after stretching the extensible fibers. That is.

(Function) With the above-mentioned configuration, in the first invention, in the part where the extensible fibers are elongated by tension processing or press processing, many short fibers can be handled, the density thereof decreases, and the fiber spacing becomes coarse, The air permeability changes depending on the degree of elongation of the fibers due to tension processing, press processing, etc., or the number of processed areas.In addition, in the second invention, the density of extensible fibers and short fibers is changed by tension processing, press processing, etc. is partially changed, resulting in stretched paper with partially different dyeing conditions depending on the density of the fibers.Also, in the third invention, stretched paper is produced with various properties imparted by chemicals.

(First Embodiment) Hereinafter, a first embodiment of a stretched paper in which the present invention is embodied as a filter paper will be described with reference to FIGS. 1 to 3.

As shown in Figures 1 and 2, the piece of paper 1 has a length of about 'l□
Thermoplastic synthetic fiber 2 (polyester fiber for paper making manufactured by Yojinsha, trade name FTMO7N-1) as extensible fiber of mm
,1DX10j >,! :, bmm and r manila hemp 3
(iIf length of about 3 to 4 mm), paper is made so that the fiber direction is aligned with the rotation direction of the circular cylinder, and paper is made so that the aspect ratio is reduced in the am direction.

Note that extensible fibers are fibers that become thinner, elongate, and undergo plastic deformation when pulled. Furthermore, short W4 fibers are short and difficult to stretch. It should be noted that the paper strip 1 can also be made using a short screen, fourdrinier, or other paper machine other than a circular mesh cylinder.

The synthetic fiber 2 is a low softening point type synthetic fiber that has plasticity even at room temperature. Moreover, the paper piece 1 is made of synthetic fiber 2
The weight ratio of Manila hemp 3 is 70-60% = 30-40%
The thickness of the paper strip 1 is set as follows.
It has a diameter of 50 to 60 microns and a weight of 25 to 30 g/m2.

Incidentally, the length of the synthetic fibers 2 may be changed in the range of 4 to 20 mm, and the length of the fibers of the Manila hemp 3 may be changed in the range of 1 to 6 mm. Also, the weight of paper piece 1 is 20 to 100 CJ/m
It may be changed within the range of 2.

The right side portion of the paper strip 1 in FIG. 1, in which each fiber direction is strong against tensile force in the longitudinal direction along the rotational direction of the circular mesh cylinder, is a filter formed by stretching the right end of the paper strip 1 in the direction of the Z arrow. Part F (width 2 to 4 mm), the third
As shown in the figure, the synthetic glue @ 2 is stretched and Manila hemp 3
is being treated, and its density has decreased. still,
The stretching process of the paper strip 1 is performed by sequentially pulling different parts of the paper strip 1 at small width intervals along the longitudinal direction of the synthetic fibers 2 so that the strong and flexible synthetic fibers 2 are stretched without being cut. Let's do it.

The operation of the stretched paper constructed as described above will be explained.

In the filter part F of the paper strip 1 formed by tension processing, the synthetic fibers 2 are stretched and the manila hemp 3 is handled, and the density of the Manila hemp 3 is reduced, so the air permeability in that part is lower than that of the tension processing. Piece of paper that has not been removed 1
It is larger than . Therefore, the piece of paper 1 provided with this filter portion F can be used as a filter.

At this time, unlike conventional paper filters, the air permeability and water permeability of the filter section F do not need to be considered at the stage of raw materials, and can be easily determined by the strength or weakness of the tensile process applied to the paper pieces 1 after paper making. It can be easily set by changing as appropriate.

In addition, in the paper strip 1 in which each fiber direction is strong against tensile force in the longitudinal direction along the rotational direction of the circular mesh cylinder, the filter portion F is formed over the entire vertical width direction of the paper strip 1 as shown in FIG.
However, for paper with a small aspect ratio in the fiber direction, the paper piece 11 is held between a pair of molds by Michio, which has a plurality of cone-shaped unevenness corresponding to each other, and the paper piece 11 is pressed and air embossed. As shown in FIGS. 4 and 5, a plurality of conical filter sections may be formed so that the strong and flexible synthetic fibers 2 can be stretched without being cut. In this case, since the periphery of the filter part F remains a piece of paper without being pressed or embossed, the filter part F can be provided without impairing the strength of the paper piece 11.

In addition, if a chemical that imparts water resistance (wetness enhancer, for example, product name Kaimen 2064 manufactured by Dick Vercules Co., Ltd.) is applied to the paper strip 1.11 on which the filter portion F is provided, it can be used underwater. It can be used as a filter.

As shown in FIGS. 6 and 7, instead of the conical filter section F, a truncated cone-shaped filter section F or a square bell-shaped filter section F as shown in FIG. They may be pressed or embossed so that they are spaced apart from each other by a predetermined distance. Alternatively, as shown in FIG. 9, strip-shaped filter portions F may be provided on the paper strip 14 at a predetermined distance from each other.

As described above, as a desirable processing condition, paper that is strong in the rotational direction of the cylinder, that is, longitudinally, should be subjected to tension processing as shown in Fig. 1, and paper with a small aspect ratio of m-fibers should be subjected to r J # 6 * 7 r8 As shown in Fig. 7, it is preferable to perform pressing or embossing in which the fibers are simultaneously stretched vertically and horizontally.

(Second Embodiment) Next, a second embodiment of a stretched paper in which the present invention is embodied in a medical adhesive tape paper will be described only with respect to the differences from the first embodiment.

As shown in FIG. 10, pieces of paper 16 formed into a tape shape are stretched in the longitudinal direction at predetermined intervals from each other, and while the synthetic fibers 2 are stretched, the manila hemp 3 is handled. Ventilation section 17 with reduced density of 3
is formed, a release agent is applied to the surface thereof, and an adhesive is applied to the back surface. The shipping paper strip 16 is a wide paper made of a mixture of synthetic fibers 2 and manila hemp 3, with silicone, carbamate, etc. applied as a release agent on the surface, and further,
After applying natural rubber, high polymer glue, etc. as an adhesive to the back side of the wide paper, it is stretched in the longitudinal direction at a predetermined distance from each other, and then cut into narrow pieces. ing.

The paper piece 16 is a wide paper made of a mixture of synthetic fibers 2 and manila hemp 3, which is stretched in the longitudinal direction, and a release agent such as silicone or carbamate is applied to the surface of the paper.
Natural rubber is used as an adhesive on the back of the wide paper.
It may also be made by applying a high polymer glue or the like and then cutting it into narrow widths.

Therefore, even when this tape-shaped piece of paper 16 is used for medical purposes and is attached directly to the skin, since air passes through the ventilation portion 17, unlike conventional tapes, the skin is less likely to get stuffy. Furthermore, the air permeability of the paper strip 16 can be easily set to an arbitrary value by appropriately changing the interval at which the ventilation portions 17 are formed or by changing the force used during tension processing.

In addition, as shown in FIG. 11, a piece of paper 16 formed into a tape shape
The synthetic fibers 2 are stretched by pressing or embossing in the longitudinal direction at a predetermined distance from each other, and the ventilation portions 18 are formed by handling the manila hemp 3. The depth of embossing may be appropriately changed to easily set the air permeability to an arbitrary value.

(Third Embodiment) Next, a third embodiment of stretched paper in which the present invention is embodied in paper for twisting will be described with reference to FIGS. 12 and 13 only with respect to the differences from the first embodiment.

As shown in FIG. 12, pieces of paper 21 formed into a tape shape are stretched in the longitudinal direction at predetermined intervals from each other, and while the synthetic fibers 2 are stretched, Manila hemp 3 is handled and made into Manila hemp 3. An 8-twist portion 22 with reduced density is formed. Further, the portion of the paper strip 21 which is not subjected to tension processing and adjacent to the easy-to-twist portion 22 is a difficult-to-twist portion 23 in which synthetic fibers 2 and manila hemp 3 are made into paper.

Therefore, as shown in FIG. 13, the 8-twist portion 22 of this tape-shaped piece of paper 21 is twisted using a known method to form a twisted portion 22a, and the difficult-to-twist portion 23 is loosely twisted to form a rounded shape. The difficult-to-twist portion 23a has an elongated cylindrical shape or an elongated round shape. Then, the paper piece 2
1 is a twisted yarn 24 formed by connecting a difficult-to-twist portion 23a and a twisted portion 22a. Therefore, the twisted yarn 24 alone has a unique appearance and a high design effect, and even a box body can be used for decoration.

Here, the relationship between the tensile strength during tensile processing of the paper strip 21 and the elongation of extensible fibers was determined based on experimental data tested using a strength tester (Model 5TROGRAP H-R manufactured by Rika Denki Kogyo Co., Ltd.). This is shown in the graph diagram (Fig. 14).

The vertical axis of the graph shows the tensile force, and one scale is 0.
5 is Ω. The horizontal axis of the graph shows the elongation of one sample, and one scale is 4 mm. The tensile speed of this testing machine is 50 mm/min, and the grip interval is 3 Qm.
m.

The piece of paper used as a sample for this test consisted of synthetic fiber 2 (polyester fiber "TMO7N-1, 1DX10j)"
0%, Manila hemp 3 (beating degree 5R3011!) is 30%,
The width is 15 mm, and the thickness of paper strip 1 is 50 to 60 microns.
The weight is 25 to 30 q/m2, and the drying temperature using a steam dryer during paper making is 120 degrees Celsius.

Note that line A shows the case where the fiber length of the synthetic fiber 2 is 10 mm, and line B shows the case where the fiber length is 5 mm. Line A
, B, the manila hemp 3 can be handled with a tensile force of 2.5 kg, and the synthetic fiber 2 starts to elongate from point 11, where it has elongated by about 2 mm. It is also shown that even when the synthetic fiber 2 is stretched, the tensile strength does not decrease much until 12 points. Therefore, it is shown that it is practically preferable to stretch the synthetic fiber 2 so that it has an elongation between 11 points and 12 points.

Note that the drying temperature by Steam Dry A2 may be varied within the range of 90 degrees Celsius to 130 degrees Celsius, but a drying temperature of 120 degrees Celsius is most suitable for this stretch paper. In addition, synthetic fibers 2 having a fiber length of 1 Q mm are more stable at 11 to 12 points than shorter synthetic fibers, and therefore are suitable as stretch paper.

In each of the above Examples, uncolored extensible fibers and short fibers were used, and paper strips 1.11 were formed by mixing both fibers.
, 12, 13, 21, etc. were used without coloring, but they were dyed with dyes (for example, Kayastin Q manufactured by Nippon Kayaku Co., Ltd.) that vary depending on the fiber, before stretching or pressing after paper making, or Dyeing may be performed after stretching or pressing.

In this case, the difficult-twist portion 23 that has not been subjected to tension processing or press HO processing has a color that is a mixture of the colors of both dyed fibers, and the 8-twist portion 22 where the extensible fibers have been stretched has the dyed extensible fibers. The twisted part 22a and the difficult-to-twisted part 23
It is possible to provide a mottled stretch-processed paper in which the color of a can be changed, and in addition to being used as paper for the twisted yarn 24 described above, it can be used as interesting colored paper or paper for crafts.

Roughly, if extensible fibers and short fibers are colored in different colors beforehand, and both fibers are mixed to form paper strips, the parts that have not been subjected to tension processing or press processing, etc., will be made of both paper strips. The color of the fibers becomes a mixed color, and the stretched part of the extensible fibers becomes the color of the extensible fibers, so it provides stretch-processed paper that can change the color of the part that has been subjected to tension processing, press processing, etc. It can be used as tasteful colored paper or paper for crafts.

Furthermore, this invention is not limited to the above embodiments,
The thermoplastic synthetic fiber may be carried out using other synthetic fibers such as "Sofit 1-" manufactured by Kuraray Co., Ltd., or a high softening point type that softens at high temperatures is used to heat the paper strip, and then the tensile strength is applied. It can be carried out by processing, or by changing the weight ratio of synthetic fibers and staple fibers as appropriate,
As the short fibers, short, hard-to-stretch natural fibers such as pulp and mitsumata, synthetic fibers such as vinylon, rayon, and polyester may be used, and the thickness of the paper strips may be appropriately changed. Applying or impregnating synthetic resin as a chemical other than that used for It is also possible to make arbitrary changes without departing from the spirit of the invention, such as applying or impregnating it with a separate agent.

Effects of the Invention As detailed above, when the stretch-processed paper according to the first invention is used as a filter, it can easily be made air permeable by changing the degree of stretching of the stretchable fibers through tension processing, press processing, etc. The twist can be changed, and when twisted to be used as a twisted yarn, it is possible to obtain a twisted yarn with the characteristic that the twist is mainly applied in the portion where the extensible m-fibers are stretched by tension processing. Furthermore, in the second aspect of the invention, since the density of the extensible fibers and short fibers is partially changed by the stretching process, it is possible to obtain pieces of paper with different dyeing levels depending on the density of the fibers. In general, the third invention has the excellent effect of being able to obtain pieces of paper with various properties depending on the chemical.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the stretched paper of the first embodiment in which the present invention is embodied in a filter, Fig. 2 is a sectional view taken along the line FIG. 4 is a plan view of stretched processed paper showing another example of the filter; FIG. 5 is a sectional view of the filter portion;
Figure 6 is a plan view of stretched paper showing another example of the filter, Figure 7 is a sectional view of the filter section, and Figures 8 and 9 are plan views of stretched 7JD paper showing other examples of the filter. , FIG. 10 is a perspective view showing the medical tape of the second embodiment,
Fig. 11 is a perspective view showing another example of the medical tape, Figs. 12 and 13 show the third embodiment, Fig. 12 is a plan view of stretched paper made into a tape, and Fig. 13 is a twisted yarn. plan view of
FIG. 14 is a graph showing the relationship between tensile strength and elongation of extensible fibers when a piece of paper is subjected to tensile processing. 1.11, 12.14, 16.21... piece of paper, 2...
- Synthetic fiber as extensible fiber, 3... Manila hemp as short fiber, 24... Twisted yarn, i7, 1a... Ventilation part, F... Filter part. Patent applicant Daifuku Paper Co., Ltd. Agent Patent attorney On 1) Hironobu Figure 14 Extension (mm) Figure 10 Figure 11

Claims (1)

[Scope of Claims] 1. A stretch-processed paper, characterized in that stretchable fibers and short fibers are mixed, and at least a portion of the paper is stretched or pressed to stretch the stretchable fibers. 2. The stretched paper according to claim 1, wherein the stretchable fibers are thermoplastic synthetic fibers. 3. Stretch-processed paper, characterized in that extensible fibers and short fibers are mixed, at least a portion of which is subjected to tension processing, press processing, etc., and dyed before or after stretching the extensible fibers. 4. Stretching characterized by mixing extensible fibers and short fibers, applying or impregnating with a chemical before or after stretching the extensible fibers by subjecting at least a portion of the mixture to stretching or pressing. Processed paper. 5. The stretched paper according to claim 4, wherein the chemicals are a release agent and an adhesive.